According to anthropologist Marvin Harris, which of the following is a likely explanation for the place of cows in Indian society?

A. Cows are used solely to produce manure, which is an essential material in India's agricultural practice.
B. Cows play a critical role in India's rural economy, providing oxen for plowing and manure for fertilizer and fuel.
C. Reverence for cows is based entirely on religious traditions and has no practical explanation.