Read the following excerpt from a student essay. How can the writer best improve his or her grammar and mechanics?
Raise the minimum driving age from sixteen? I don't think so. Driving a vehicle is important for teens. A life-changing experience. Being able to drive teaches teens responsibility and decision-making skills. Many teens have jobs or sports practices after school. Need to drive themselves to these places. If the driving age were raised, there would be problems for teens. More difficult to get around. Fewer chances for responsibility. No to raising the driving age!

 - by fixing sentence fragments
 - by fixing subject-verb agreement errors
 - by correcting misplaced modifiers
The writer could best improve his or her grammar and mechanics by fixing sentence fragments.
For example, the writer could revise the underlined fragments to make them complete sentences.
Raise the minimum driving age from sixteen? I don't think so. Driving a vehicle is important for teens. A life-changing experience. Being able to drive teaches teens responsibility and decision-making skills. Many teens have jobs or sports practices after school. Need to drive themselves to these places. If the driving age were raised, there would be problems for teens. More difficult to get around. Fewer chances for responsibility. No to raising the driving age!