"Intransigent'' means unwilling or refusing to change one's views or to agree about something; stubborn.
Step 1: Analyze options
- (A) Magnificent: very beautiful and impressive.
- (B) Mysterious: difficult or impossible to understand, explain.
- (C) Aggressive: ready or likely to attack or confront.
- (D) Flexible: capable of bending easily without breaking; willing to change or compromise.
Step 2: Find opposite
The opposite of being stubborn and inflexible is being "Flexible,'' so option (D) is correct.