THE PARAGRAPH BELOW IS THE SECOND PARAGRAPH

The population of the U.S. is growing all the time. A growing population means more cars on our roadways. That means more trash. One way to reduce the amount of trash on roads is for more people to adopt highways. Several states have "adopt-a-highway" programs. The programs allow people or groups to "adopt" a section of a highway. That person or group is responsible for making sure that section of the highway stays clean. This helps the state save money. That money can then be used to make landmarks and monuments beautiful. This is money that the state would have had to pay someone to clean the highway.
Which of the following sentences should be added to the second paragraph to support the idea that volunteering saves money?

Which of the following sentences should be added to the second paragraph to support the idea that volunteering saves money?
A.
Volunteering to adopt a highway is one of the most patriotic things a citizen can do.
B.
For example, in Texas, volunteers clean almost 8,000 miles, and this saves taxpayers about $2.5 million a year.
C.
If all the trash on the highways were to be gathered in a landfill, the weight would be enough to move the soil several feet.
D.
To adopt a highway is to take on a great responsibility to yourself as well as the state you serve.