Answer: B) 1 minute.
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Work Shown:
Subtract the time values
131.25 - 119.5 = 11.75
This rounds to 12 when rounding to the nearest whole number.
This means she ran about 12 minutes faster. Since she ran 12 miles, this tells us she ran about 12/12 = 1 minute faster per mile.
The more accurate amount is 11.75/12 = 0.97916666666667 and we can see this is fairly close to 1. If we round to the nearest whole number, then we would get 1.