The answer is b
Hope this helps
D. Inconsiderate. Past girlfriends had previously called him "insensitive" which means that his word/actions can also be considered as a lack of sensitiveness or understanding.
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.
Answer:
they use new technique to solve a question
