What is Paragraph 3 mainly about？A．The structure of straw houses.B．The possibility of buil

What is Paragraph 3 mainly about？

A．The structure of straw houses.

B．The possibility of building straw houses.

C．The suggestions for building straw houses.

D．The advantages of straw houses.

请帮忙给出正确答案和分析，谢谢！