以下哪些是调整传统悬架的主销后倾角和车辆外倾角方法（）。

A.加减垫片方式；

B.偏心机构和垫片；

C.开槽支架；

D.转动球头节和垫圈。

—Do you know Tina well?

—Yes. She and I ______ friends since we met last summer.[ ]

A. have made

B. were

C. have been