After World War II, Americans shifted to more service and agricultural jobs in a way, they decided that they should be more self-sufficient in terms of agronomy, but more importantly, they turned towards service with the rise of consumerism. Consumerism in America greatly dictated how the country has progressed in the past few decades.
B is the right answer for that reason.
Rule 4-6 Basketball Interference
Well you can cancel a few out...
cook - no, I mean you're just cooking you may not know a lot about nutrition
epidemiologist - they determine diseases and such, so no.
Dietitian - Yes, expert in nutrition
Health Educator - I mean maybe, but they may not know anything about nutrition
Because it would be respectful to their patients and it shows them that they really care about them, and it makes their patients feel like they're making their god proud<span />