Nelson currently buys six shawarma a month, at a price of $7 each. What is MOST likely to happen if the price falls to $6?
a) He will buy more if his marginal benefit is greater than $6.
b) He will buy more if his marginal benefit is less than $6.
c) He will still buy six even if his marginal benefit is greater than $6.
d) He will buy more only if his marginal benefit is greater than $7.