Answer:
Credit card companies should focus on creating responsible users
Step-by-step explanation:
Here's why...
Lots of companies give away free T-shirts, they want to promote their brand. So that answer does not make sense.
The one about young adults not paying their bills on time, would make sense if the article talked about young adults knowing their bills and just not paying them.
Credit card companies focusing on creating more responsible users is correct. Because the companies are the ones giving these young adults the opportunity to get a credit card, they are the ones giving these young adults the opportunity to have credit.
The last one just doesn't apply in this situation.