B.CHOICES A,C, AND E ARE INCORRECT BECAUSE THE HELPING VERB ISIS R...

62. b.Choices a,c, and e are incorrect because the helping verb isis required to make the sentence logical.Choice eis also missing the preposition through, which is necessary for the correct meaning as sug-gested by the context of the sentence. Choice duses the preposition byinstead ofthrough, which isinconsistent with the final phrase and also less correct as suggested by the context of the sentence.