Answer:
“decided immediately”
Step-by-step explanation:
Context clues are a reading technique that helps us infer the meaning of an unknown word by looking at the surrounding information of that word; it is a tool particularly useful when we want to save the time spent looking up words in the dictionary. In this paragraph, the context clue that helps us figure out the meaning of “impulsive” is the phrase “decided immediately” because to have an impulsive character is equal to be inclined to make rapid decisions without due consideration.