Task: Question Answering
Input (English): Question: The toll for crossing a certain bridge is $0.70 each crossing. Drivers who frequently use the bridge may instead purchase a sticker each month for $13 and then pay only $0.30 each crossing during that month. If a particular driver will cross the bridge twice on each of x days next month and will not cross the bridge on any other day, what is the least value of x for which this driver can save money by using the sticker?

 Option A: 14

 Option B: 15

 Option C: 16

 Option D: 28

 Option E: 29
Output (English): Option C