Is the following a sentence or a fragment: they can't. fragment sentence

Which detail from "harrison bergeron" best communicates the idea that life gets worse when people fail to think critically? o a. hazel decides that she wants to break harrison out of prison o b. george wears neck weights to make him move more slowly o c. george can't finish a thought about handicaps being a bad thing. o d. hazel is average because she is burdened with technological handicaps.