Select the most appropriate option to substitute the bracketed segment in the given sentence. If there is no need to substitute it, select 'no substitution required'. The unit twitched like a bird (preening it's plumage and becomes motionless).
- A.preening its plumage and became motionless
- B.no substitution required
- C.preening it's plumage while becoming motionless
- D.to preen it's plumage and becomes motionless
Explanation
The sentence is in the past tense (twitched), so 'became' and the possessive 'its' are correct: 'preening its plumage and became motionless'.