Step 1: Understanding the Question:
The question asks us to identify the meaning of the common English idiom ``costs an arm and a leg'' within the context of the sentence.
Idiomatic expressions should not be interpreted literally.
Step 2: Key Concepts and Idiomatic Meanings:
Idioms are phrases where the collective meaning is different from the literal dictionary definitions of the individual words.
The phrase ``an arm and a leg'' represents an incredibly high price because losing limbs is an extreme and costly sacrifice.
Step 3: Detailed Explanation:
• Option (B) - very expensive: This is the correct figurative meaning of the idiom.
If a plot of land costs an arm and a leg, it means the price is exceptionally high, and purchasing it requires an immense financial stretch.
• Option (A) - moderate: This means average or reasonable in cost, which contradicts the extreme nature of the idiom.
• Option (C) - cheap: This is the antonym of the actual meaning of the phrase.
• Option (D) - for sale: This is a literal status of real estate and does not convey the price aspect indicated by the idiom.
Step 4: Final Answer:
Thus, the correct answer is Option (B).