C) MgO aka magnesium oxide
I believe the answer is background radiatin
Collagen in the human body connects and supports bodily tissue such as skin, bones, muscles and cartilage. It supports the internal organs and can even be found in teeth! Collagen's main function is to sustain tendons, skin, and cartilage and provide firmness and elasticity to those structures.
<h2>see in the attachment hope it helps you</h2>
B- 90 grams bc 45 mL times 2 equals 90
