You have 42 coins valued at $3.00/ Some of the coins are dimes and some are quarters. which system of equations could you use to determine the number of dimes and the number of quarters you have?

A) 0.10d+0.25q=42 and d+q=3
B) d+q=42 and 0.10d+0.25q=3
C) d+q=42 and d+q=3
D) d+q=42 and 0.25d+ 0.10q=3