Which are the "i" prepositions
a. in, inside, instead of, into
b. into, inform, invert, impale
c. ice, ice cream, in side
d. intern, inspect

The correct answer is A! It has only prepositions in it! The other answers have examples of other classes of words in them.

examples why the other options are bad:
B.  inform: a verb
C. ice: a noun
D.  inspect  : a verb

The big bang theory suggests that the universe is constantly expanding and that stars, galaxies and other entities are moving away from each other. if there were a galaxy moving closer to earth then that would contradict the big bang theory since the entities should be moving away from earth and from each other.