5. Correct these sentences for faulty parallelism.

a. The letter directed us to preview the contracts, sign them, and to return them promptly.

b. The rules were fair but that they could not be enforced.

c. Margarita and Jerome were told to be at the office at 2 p.m. and that they had to refill the rental car with gasoline.

d. She had trouble explaining her position and which decision to make.

e. The new product line is noted for its durability, its attractiveness, and it is reliable.