Subject: mathqa
Question: on sunday , bill ran 4 more miles than he ran on saturday . julia did not run on saturday , but she ran twice the number of miles on sunday that bill ran on sunday . if bill and julia ran a total of 16 miles on saturday and sunday , how many miles did bill run on sunday ?
Option: 
A: 6
B: 9
C: 8
D: 5
Answer: D