=>
There are three ways to choose one meat (beef, pork or fish), three ways to choose one vegetable (lettuce, spinach or cucumber), and 3 ways to choose one sauce (oriental sauce, spicy mayo or sesame soy sauce).
So, the total number of different wraps that can be bought is

3*3*3 = 27.

Therefore, E is the answer.

Answer: E

The question says you must select at least one of 3 meats, which mean you can select 1 meat or 2 or 3. The question also says that you can (not must) add one sauce, which means you can add 0 sauce or 1 sauce.

Number of ways to select 1 meat: 3C3 = 3
Number of ways to select 2 meats: 3C2 = 3
Number of ways to select 3 meats: 3C3 = 1

The total number of ways to select meat = 3 + 3 + 1 = 7.

Number of ways to select 1 veggie: 3
Number of ways to select 0 sauce OR 1 sauce: 1 + 3 = 4.

# of different wraps = (Total number of ways to select meat)*(Number of ways to select 1 veggie)*(Number of ways to select 0 sauce OR 1 sauce) = 7*3*4 = 84.

Where is the mistake?

Regards!