Answer:
C. Spontaneous
Explanation:
Connotation is the images, ideas, and feelings that a certain word invokes. In this case, it's asking for a positive connotation, meaning that it provides a "nice/pleasant" feeling instead of a "less than pleasant" feeling (negative connotation).
The words impetuous and rash provide a negative connotation, meaning "C," is the correct answer providing a positive connotation.