A new study suggests that the more teenagers watch television, develop depression(抑郁症) as

A new study suggests that the more teenagers watch television, develop depression(抑郁症) as young adults.
A. the more likely they are to
B. the more likely they are
C. they are the more likely to
D. the more likely are they

(答案→)A. the more likely they are toB. the more likely they areC. they are the more likely to D. the more likely are they解析：句意：新的研究表明，青少年看电视越多，长大后越有可能得抑郁症。the more…, the more…越……越……。两个the more之后，都是陈述句语序。句中空格后develop是一个动词，不可直接在前用be动词， 而be to do sth表示可能性，可以指将来。

就是这个解释