Research indicates that which one of the following factors likely gave

Research indicates that which one of the following factors likely gave rise to increased obesity in the U.S.?

(a) Advancements in modern cooking technology
(b) Increased consumption of restaurant and fatty foods
(c) A shift from exercise in leisure to labor
(d) All of the above

ANSWER

(a) (Contrary to popular beliefs, the microwave and other modern day conveniences have been held accountable for increases in U.S. obesity rates.)