Use the drop-down menus to find the best explanation for the purpose of the signal words in each sentence. | Marley did not finish her homework because she fell asleep. | Since Leo broke his leg two days before the soccer game, he could not play.

In the first sentence, “because” introduces the reason Marley did not finish her homework: she fell asleep. In the second sentence, “since” also introduces a reason: Leo broke his leg, so he could not play. Therefore, choice A correctly explains the purpose of “since”; choice B incorrectly describes a sequence of events.

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