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do/while Loop not working

Diabolique (11)
I cannot for the life of me figure out why this loop is not working. It should restart the program when a user selects one of the valid inputs, but instead the program exits and ignores the do/while loop and the system("pause") at the end.
For simplicity's sake, I'm just including my main() section and not the functions that accompany it because I don't think they're relevant to this problem. If anybody would like me to include them, I would be happy to oblige.
Any suggestions on what I'm doing wrong here?

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  #include <iostream>
#include<string>
#include<vector>
#include <algorithm>

using namespace std;

int main() 
{
	vector <string> restaurants;
	restaurants.push_back("J&C House");
	restaurants.push_back("Sushi Burrito");
	restaurants.push_back("Cubby's");
	restaurants.push_back("Red Robin");
	restaurants.push_back("Boudreaux's");
	restaurants.push_back("Domino's");
	restaurants.push_back("Jimmy John's");
	restaurants.push_back("Tucanos");

	string option;

	do
	{
		cout << "Please choose an option:" << endl;
		cout << "A: Display all restaurants" << endl;
		cout << "B: Add a restaurant" << endl;
		cout << "C: Remove a restaurant" << endl;
		cout << "D: Shuffle the vector" << endl;
		cout << "E: Begin the tournement" << endl;
		cout << "F: Quit program" << endl;

		cin >> option;
		string userRestaurant;

		if (option == "A" || option == "a")
		{
			optionA(restaurants);
		}

		if (option == "B" || option == "b")
		{
			cout << "Please type the name of the restaurant you would like to add:";
			cin.ignore();
			getline(cin, userRestaurant);
			if (find(restaurants.begin(), restaurants.end(), userRestaurant) != restaurants.end())
			{
				cout << "We already have that restaurant.";
			}
			else
			{
				cout << "Your restaurant has been added." << endl;
				add(restaurants, userRestaurant);
				optionA(restaurants);
			}
		}

		if (option == "C" || option == "c")
		{
			cout << "Which restaurant would you like to remove? ";
			cin.ignore();
			getline(cin, userRestaurant);
			if (find(restaurants.begin(), restaurants.end(), userRestaurant) != restaurants.end())
			{
				remove(restaurants, userRestaurant);
			}
			else
			{
				cout << userRestaurant << " is not on the list." << endl;
				cout << endl;
			}
			optionA(restaurants);

		}

		if (option == "D" || "d")
		{
			random_shuffle(restaurants.begin(), restaurants.end(), random);
		}

		if (option == "E" || "e")
		{

		}

		if (option == "F" || "f")
		{
			exit(0);
		}
	} while (option == "A" || "a" || "B" || "b" || "C" || "c" || "D" || "d" || "E" || "e");

	system("pause");
	return 0;
}
helios (17575)
 
 
} while (option == "A" || option == "a" || option == "B" || /*etc.*/);
Your ifs on lines 75, 80, and 85 are incorrect for the same reason.
Diabolique (11)
You, sir, are a saint and a scholar. Thank you so much!
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