Answer:Amount of lawnowner bought by Sarah=$320 Down payment by Sarah= $100 Sarah paid in 12 months = 12 x 25 $ = 300$ $ paid by sarah = 300+12$=400$ Excess amount paid as interest by sarah=400-320=80$ yearly rate of interest paid by sarah = 80/320 x 100=25% so 25% yearly interest was paid by sarah, so the correct option is C. hope this helps.
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