Question

by studying the suffix, the reader can determine that \impetuous\ most likely means
\having the quality of acting impulsive or with emotion.\
\someone who is filled with impulsiveness and emotion.\
\someone who acts without impulsiveness or emotion.\
\having a state or condition that is impulsive or emotional.\

Explanation:

The suffix -ous often indicates having a certain quality. Impetuous relates to impulsive - acting with emotion.

Answer:

A. "having the quality of acting impulsive or with emotion."