Final answer:
The sentence 'Since it was raining outside, the football game was canceled.' uses transitional words to show cause/effect relationships.
Step-by-step explanation:
The sentence that uses transitional words to show cause/effect relationships is: Since it was raining outside, the football game was canceled. Here, the word 'Since' indicates the cause (rain), and the result is the cancellation of the football game. Transitional words like 'since,' 'because,' 'as a result,' or 'therefore' are commonly used to show cause and effect relationships in sentences.
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