The meaning of the phrase:

The phrase "a storm in a teacup" is an idiomatic expression that means making a big fuss or creating a lot of drama about a trivial or insignificant matter. It implies that the situation may seem intense or important initially, but in reality, it is blown out of proportion and lacks real substance or significance.

Explanation of the answer:

The correct answer to this question is option 'B' - Fuss about a trifle. Let's break down the phrase and understand why it fits the given context:

1. Fuss: The word "fuss" refers to excessive or unnecessary excitement, activity, or agitation. In this context, it suggests that the young couple's quarrel created a lot of commotion or drama.

2. About: The word "about" indicates the subject or reason for the fuss or commotion.

3. A trifle: The phrase "a trifle" means something of little importance or value. It signifies that the cause of the quarrel was insignificant or trivial.

Therefore, the phrase "a storm in a teacup" means that the young couple's quarrel was blown out of proportion and created a lot of drama, even though the actual matter at hand was insignificant or trivial.

Other options:

- Option 'A' - Violent quarrel: This option suggests that the quarrel between the young couple was intense or aggressive, which is not implied in the given context. The phrase "a storm in a teacup" does not convey violence, but rather exaggeration.

- Option 'C' - Brittle situation: This option implies that the situation was delicate or fragile, which is not the intended meaning of the phrase. The phrase emphasizes the triviality of the matter rather than the fragility of the situation.

- Option 'D' - Quarrel about teacups: This option takes the literal meaning of the phrase, which is not applicable in this context. The phrase is used figuratively to describe a situation blown out of proportion, not an actual quarrel about teacups.