BlueCross Plans Originally Covered Only Hospital Bills, and BlueShield Plans

BlueCross plans originally covered only hospital bills, and BlueShield plans covered fees for physician services, and there was close cooperation between the plans that resulted in joint ventures where the two corporations were housed in one building. In these joint ventures, BlueCross BlueShield (BCBS) __________.

A) contracted with providers to offer hospital and physician services, regardless of plan
B) merged as a single corporate entity and was able to significantly reduce premium costs
C) provided health care services and procedures to subscribed patients in the building
D) shared one building and computer services but maintained separate corporate identities