The phrase “turning sour”...

Câu hỏi: The phrase “turning sour” in paragraph 4 refers to the fact that

A the large and lowest possible-cost McMansion became unaffordable for many owners

B land developers built homes using a similar basic design and identical construction methods

C the materials used to construct framing and interior fittings were often of a low quality

D suburban areas were full of huge homes that all looked similar to each other