Objective: How can I make a mouse trap that doesn't harm the mouse it catches.

Which of the following solutions is more sound in terms of naive physics reasoning?

OPTIONS:
(A). Attach a screen mechanism to the outside of a large coffee can. When the mouse goes into the can the screen will cover the exit so the mouse will be stuck inside the can.;
(B). Use food to lure the mouse then place a mechanism with a net attatched to it. When the mouse grabs the food the net will cover the mouse trapping it under the net.;
(A).