Select the real-world problem that could be solved using a proportion. A Sheila travels 180 miles in 6 hours. At this rate, how far will she travel in 10 hours?

B Sheila has 6 pens and 10 pencils. How many more pens does she need to make the number of pens and pencils she has equivalent?

C Sheila must pay $180 for a phone and then $30 each month for service. How much will she have paid after 10 months?

D Sheila has 3 dogs and adopts 2 more. How many dogs does she have in total?