Text Completion- Please help to explain the answer (B)

The theory of cosmic evolution states that the universe, having begun in a state of simplicity and -------,
has ------- into great variety.
(A) equilibrium…modulated
(B) homogeneity…differentiated
(C) contrast. .metamorphosed
(D) proportion… accelerated
(E) intelligibility…developed

Source GRE big book

the word variety is helpful for the first blank.

After that You can use POE (Process of Elimination).

apply math strategy for blank 1 (clue: “and”). For the second blank, focus on the word “variety” which indicates that it has transformed into multiple things. Therefore, B is correct.

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