Nine months before Rosa Parks made history by refusing to comply with the segregated seating policy on a Montgomery,
Alabama, bus, a ﬁfteen-year-old Montgomery girl named Claudette Colvin was arrested for the same ______ to some
historians, Colvin’s arrest led to Parks’s action and eventually to the desegregation of Montgomery’s bus system.
offense. According
offense, according
offense according
offense and according
Choice A is the best answer. “Nine months…offense” and “according to…system” are both independent clauses. Separating
them with a period and turning them into their own sentences is the only grammatically correct choice among the provided
options.
Choice B is incorrect. This choice results in a comma splice error, which is a punctuation error that occurs when two
independent clauses are joined by only a comma. “Nine months…offense” and “according to…system” are both independent
clauses, so they need to be either joined by a semicolon, joined by a comma and a coordinating conjunction, or separated by
a period. Choice C is incorrect. This choice results in a run-on sentence, which occurs when two independent clauses are
joined without punctuation. “Nine months…offense” and “according to…system” are both independent clauses, so they need
to be either joined by a semicolon, joined by a comma and a coordinating conjunction, or separated by a period. Choice D is
incorrect. This choice results in a run-on sentence, which occurs when two independent clauses are joined without
punctuation. “Nine months…offense” and “according to…system” are independent clauses, so we would need to put a
comma before the coordinating conjunction “and” to join them properly.