What is one advantage of having a credit card?

A or C

Explanation:

Can help you budget if you know how much you are spending.

The best topic for the talk is: How much exercise you can get into very short periods of time
According to short field analysis, the best way to conducted a behavioral changes is by doing the easiest/most attainable goal first before moving to the harder ones. So, when starting an exercise program, it's best to focus on the lowest targets/movement before moving up to a more advanced ones.