Replacing parameters with structure type

[randomsites]

So I made a struct for vehicle:
struct Vehicle
{
string category;
int occupants;
};

And, Now i have to Replace string and int paramters with 1 Vehicle structure type:

string GetRecommendation(string category int occupants);

I have NO IDEA what to make for the one parameter thats "1 vehicle structure type"

[Peter87]

string GetRecommendation(Vehicle vehicle);