When I was in hospital, my mother promised me that she would take me to Qingdao ________

I was well enough to travels, which ________ my recovery.[ ]

A. direct; contributed to

B. directly; contributed to

C. directly; refered to

D. direct; refered to

下列选项中，正确表述事物之间必然联系的是（）

A、生产力的发展决定生产关系的变革

B、人口的增长速度决定社会形态的更替

C、社会意识的变革是社会革命的根本原因

D、地理环境决定社会政治制度的性质