Laura's attempt at trying to use an English idiom reveals that she is eager to try English phrases and expressions.
She says "There's no use trying to drink spilt milk," and even though her use of the idiom is incorrect (it should be - there's no use crying over spilt milk), she still really wants to try and better her English speaking skills, which is always quite commendable.
The correct option is c) “Parallelism”
Parallelism is a writing device used to add information using the same pattern and grammar structure. In this sentence the same pattern preposition+ noun is used. The examples are: “in the summer” and “on holidays”
Option A) “repetition epistrophe” is incorrect since it repeats the same word or phrase at the end of successive verses.
Option B) “repetition anaphora” is incorrect since it repeats the same word or phrase at the beginning of successive verses.
Option D) “repetition anadiplosis” is incorrect since it repeats the same word or phrase at the end of a verse and at the beginning of the next one.
I think for this one, it is he devoted himself to scientific research.