Which is the best way to write the underlined portion of this sentence?

— ExhibitC ­

Sentence 1For those who are looking to learn about engine repair, diagnostics, or other auto repair problems sign up for a class!

Which is the best way to write the underlined portion of this sentence? If the original is the best way, choose optionA.

A. repair problems sign

B. repairing problems sign

C. repair problem sign

D. repair problems, sign

E. repair problems signing

View Answer

Answer: D