Which element of a cooperative relationship is Brayden demonstrating?

Brayden wishes that his girlfriend would pay for some of their dates. He says to her, "Sometimes I feel like I am being taken advantage of when I am always expected to pay. I would appreciate it if you would cover the costs of our dates once in a while."

A) being tolerant

B) making clear statements

C)working toward common goals

D)understanding others' perspectives​