Select the most appropriate option to substitute the underlined segment in the given sentence. If no substitution is required, select No improvement. Be polite and courteous will greatly improve your chances of making friends at your new office. (a) By being polite and courteous (b) for being polite and courteous (c) No improvement (d) Being polite and courteous

Options

A. By being polite and courteous
B. For being polite and courteous
C. No improvement
D. Being polite and courteous

Answer

D