Ronin has $250 in denominations of $5 and $10 bills only. He has 3 times as many $5 bills as he has $10 bills. How many of each does he have?

A) $5 bills: 10, $10 bills: 20
B) $5 bills: 15, $10 bills: 5
C) $5 bills: 20, $10 bills: 10
D) $5 bills: 25, $10 bills: 5