Look at the underlined part of each sentence. Below each sentence are given three possible substitutions for the underlined part. If one of them (a), (b) or (c) is better than the underlined part, indicate your response on the Answer Sheet against the corresponding letter (a), (b) or (c). If none of the substitutions improves the sentence, indicate (d) as your response on the Answer Sheet. Thus a "No improvement" response will be signified by the letter (d).
This scooter is not as efficient as it used to be, `underline ("instead")` it is still a very useful machine.

Options

A. similarly
B. furthermore
C. nevertheless
D. No improvement