Which sentence would make the best opening for a speech arguing for more nutritious school lunches?

A. Many students dislike the current lunch menus, and I feel they should be changed.
B. Evidence from a number of expert sources suggests that schools should design more nutritious lunch menus.
C. Spaghetti is my favorite school lunch, and I have read that it is nutritious.
D. Even though fruits and vegetables are not that popular with students, they are good sources of vitamins.

B. Evidence from a number of expert sources suggests that schools should design more nutritious lunch menus.

The sentence that would make the best opening for a speech arguing for more nutritious school lunches is:

B. Evidence from a number of expert sources suggests that schools should design more nutritious lunch menus.