Brent paid for 6 avocados with a $20.00 bill. He received $10.40 in change. Which equation can be used to find the price, P, of each avocado?
A. 6p + 20 = 1040
B. 6p- 1040=0
C. 6p - 20 - 16.10
D. 6p + 10 40 = 20