Which of the Following Sentences Is a Good Example of Parallel

Multiple Choice

Which of the following sentences is a good example of parallel structure?

A) Our company offers both vacation pay but also employee discounts.
B) Our company is not only an industry leader and it is highly profitable.
C) Our company will neither merge with a start-up firm nor sell its largest division.
D) Our company is also one of the largest in the field,not only the most profitable.
E) Our company will either boost its profitability or reduce its expenses.