Question

the agricultural revolution replaced hunting and gathering as the primary means of procuring food by 5,000 bce mainly because
a a widely diverse diet was created by farming.
b farming provided a fairly reliable food supply.
c by then humans had perfected the skills required by farming.
d farming did not require as much work as hunting and gathering.

Explanation:

Hunting and gathering was unreliable as a food - procurement method. The Agricultural Revolution introduced farming, which provided a more stable and predictable food supply. While a diverse diet (A) could be a result, it was not the main reason for the replacement. Humans did not "perfect" farming skills (C) by 5000 BCE. Farming often required significant work (D), so the key factor was reliability.

Answer:

B. farming provided a fairly reliable food supply.