Subject: mathqa
Question: a certain store sold pens for $ 0.35 each and pencils for $ 0.25 each . if a customer purchased both pens and pencils from the store for a total of $ 2.00 , what total number of pens and pencils did the customer purchase ?
Option: 
A: 9
B: 12
C: 10
D: 6
Answer: D