单选题At first, the speaker was referring to the problem of pollution inthe country, but halfway in her speech, she suddenly（）to another subject.AcommittedBswitchedCfavoredDtransmitted
单选题
At first, the speaker was referring to the problem of pollution inthe country, but halfway in her speech, she suddenly（）to another subject.
A
committed
B
switched
C
favored
D
transmitted
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