Step 1: Understanding the Concept:
An idiom is an established figurative phrase or expression whose meaning cannot be understood literally from the individual words themselves. The idiom "to upset the apple cart" is a metaphor that dates back to the Roman era, referring to an action that disrupts an organized system, arrangement, or plan.
Step 2: Detailed Explanation:
Let's consider the historical and literal imagery behind this idiom:
Imagine a street vendor who has meticulously stacked and arranged fresh apples in a balanced, neat display on a cart for sale. If someone bumps into or tips over (upsets) that cart, the entire careful arrangement is instantly ruined, causing chaos and spoiling the vendor's day.
In modern English, this expression is used when someone unexpectedly ruins an established schedule, dynamic, or carefully organized plan.
- Option (A) is the exact opposite of the phrase's meaning.
- Option (B) perfectly captures the figurative meaning of disrupting arrangements or ruining plans.
- Option (C) and Option (D) are completely unrelated to the theme of disruption.
Step 3: Final Answer:
The correct meaning of the idiom is to spoil a plan or create trouble, which matches option (B).