A client who recently had a cerebrovascular accident requires a cane to ambulate. When teaching about cane use, the rationale for holding a cane on the uninvolved side is to（）

A. prevent leaning.

B. distribute weight away from the involved side.

C. maintain stride length.

D. prevent edema.

有学者认为：“新航路开辟以后，欧洲的商人和殖民者在欧洲、亚洲、非洲、美洲之间建立了直接的商业联系”。这表明（）

A.亚非拉地区资本主义经济开始快速发展

B.以欧洲为中心的世界市场雏形开始出现

C.证明了地圆学说的正确

D.经济活动取代了战争