Which variable is most important to the following problem?

At 9:00 a. m. the wind speed at Harbor Bay was recorded. After that, the wind speed was recorded every hour. Each measurement showed an increase in wind speed of 3 miles per hour. The strongest wind was recorded at 4:00 p. m. and measured 52 miles per hour. After that, the wind speeds started to decrease. How windy was it when the experiment began?

A. the number of miles per hour the wind speed changed
B. the miles per hour recorded at 9:00 a. m.
C. the time of day when the final wind speed measurement was made