Drive a wedge between means to create division or hostility between people. The correct answer is this meaning because the expression is used figuratively, not only by its literal words.

Examples:

• Rumors can drive a wedge between close friends.
• In an HSC essay, Drive a wedge between can express this meaning: to create division or hostility between people.
• When this expression appears in a passage, connect Drive a wedge between with the idea of to create division or hostility between people.