Correct! The answer here is c.
What's going on here is that "Unlike liquids" in the beginning
forces you to put the words "solid objects" next. Why? Well, "Unlike
liquids" describes nothing but "solid objects" which is the subject of
the sentence. Introductory verbal phrases, which is what "Unlike
liquids" is in this case, must modify the subject of the sentence. Therefore,
the choice is down to two: c or d. The original sentence uses "cannot."
As a result, the choice with the word "can" keeps to a closer meaning
of the original.
Skill Practice I
Skill Practice II