Ductile is pulled into long wires.
Answer: Antimicrobial proteins.
Explanation:
Antimicrobial proteins are the type of proteins produced by the keratinocytes on the body surfaces. These proteins acts as the barrier and kills the microorganism which is trying to enter the body.
These are larger proteins containing more than 100 amino acids. They are often lytic in nature.
The cell membrane of the microbes is disrupted by the action of these amino acids or proteins on them.
A makes the most sense, though D could actually be an Ok reason, the other two aren't reasonable, a fire safety action? The door would be better open in a fire emergancy, it makes a quicker escape
