Well based on contex clues and the story i would saayyyyyyyyy D
You need to include lines 104-108
Answer: We were very frugal, very careful to save our money and not to spend too much.
Explanation:
<em> just took the test</em>
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The infinitive phrase 'to keep the children from accidentally falling in the pool' is used as C, an adverb, because its meaning is - for the reason to keep them from falling, and if the meaning is 'reason', it must be an adverbial phrase.