What is the best way to: To make a hamburger,

Available options:
[a]. grill a hamburger patty on a bbq grill, and place the raw patty onto a hamburger bun with a slice of cheese and a piece of lettuce..
[b]. grill a hamburger patty on a bbq grill, and place the cooked patty onto a hamburger bun with a slice of cheese and a piece of lettuce..
Answer:
[b].