Answer AND Explanation:
A steroid is an organic macromolecule that is biologically active with four rings arranged in a specific molecular configuration. Steroids are important components of cell membranes which alter membrane fluidity and act as signaling molecules. The two main types of steroids are corticosteroids and androgenic steroids like testosterone and estradiol.
I wanna say D, but I’m not entirely sure
Usually is only because of blood vessels breaking in the skin.
Answer:
because they can donate blood to anyone
Explanation: