The answer is for the question is B.
Answer:
Geology is the study of the earth and how it changes.
The correct answer is Choice C
The theme of a work of art is <span>a statement about an abstract idea expressed in the work of art. </span>
For the first one is the variant D because ' <span> the largest U.S. state ' it's a developed apposition which mostly are isolated through commas.
For the second one the correct answer it's variant C because '</span><span>a pack of baseball cards' it's also a developed apposition and because the sentence ends in that way we use a dot instead of comma.</span>
