In the following questions, a sentence has been divided into four parts and marked a, b, c and d. One of these parts contains a mistake in grammar Idiom or syntax. Identify that part and mark it as the answer.

A. The next generation of commercial airplanes

B. are expected to be faster

C. less fuel-thirsty and

D. more fully computerized than the present one

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Correct Answer :

B. are expected to be faster

is expected to be faster