Why does a pair of jeans look blue? A. It reflects blue light.
O B. It transmits blue light.
O C. It absorbs blue light.
O D. It reflects all colors of light except blue.

A

Explanation:

I believe the answer is A. An object is every color except the color we see, or the color that bounces off of said object. Therefore if a carpet is yellow, the carpet is every color but yellow. Yellow is the color that it rejects, bounces off of it, and the one we see.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.