Many young birds learn their species' songs by listening to adult males during a sensitive period of development. ______ , birds raised in isolation produce only abnormal, garbled vocalizations as adults.
Which choice completes the text with the most logical transition?
- A
Conversely
- B
For instance
- C
Nevertheless
- Dcheck_circle
Without this exposure
Explanation
The second sentence describes what happens in the absence of the exposure described in the first. "Without this exposure" specifies the missing condition. The others do not capture this conditional relationship.