Question $12($Mandatory$)(5$ points$)$

In dry hot area such as Greece, outside walls of houses are painted in

B$.$ green to absorb heat from the Sun efficiently to cool houses in summer.

D$.$ black to reflect heat from the Sun efficiently to keep house cool in summer.

C$.$ white to reflect heat from the Sun efficiently to keep houses cool in summer.

A$.$ black to absorb heat from the Sun efficiently to cool houses in summer.