Pat has a pocket full of quarters, dimes, and nickels. He takes \(6\) coins out of his pocket that amount to \(\$0.70.\) If there are only two denominations of coins among the \(6\) coins in Pat’s hand, how many nickels is he holding? (quarter = 25 cents, dime = 10 cents, nickel = 5 cents)

A. 2
B. 3
C. 4
D. 5
E. 6

Answer: C

Source: Princeton Review