What specialized cells and organs are necessary in multi cellular organisms because in these organisms

a) fewer cells are in direct contact with the external environment.

b) all cells are in direct contact with the external environment.

c) a body type evolved that relied on fewer body cells.

d) a body type cell evolved that requires larger sized cells.

i believe the correct answer from the choices listed above is the first option. the scientists need to look at the   validity of data, claims, hypotheses, and observations before  developing an argument. they base their arguments on facts that are present and they make sure they have proofs. 

explanation:

the correct answer: the index of refraction of the second medium is lower i tried this persons answer and it was wrong this person is lying

looks like the answer is     c     to me!