The only logical answer would be C. Unicellular, but the answers seem to be all wrong.
Answer:
all of them except the organelles as they don't have organelles
only some are multicellular too so E looks a bit suspect
Explanation:
<span>The number of protons plus the number of neutrons is called the mass number.</span>
From the deepest to most superficial: pia mater, arahnoid, dura mater
