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 means 'having the quality of'. The root word 'impetu-' is related to impulse. So "impetuous" means having the quality of acting impulsive or with emotion.

Answer:

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