Dont get this?

Question

Errors in forecasting the forward speed of the hurricane can affect

a. The number of people to evacuate

b. Time available before onset of 40-mph winds

c. The radius of the tropical storm-force winds

d. The size of the rainbands

Answer 1

Errors in forecasting the forward speed of the hurricane can affect ...

The answer has to be (a) the number of people to evacuate. The reason is that all of the other answers are not affected by the forecast, they are independent. The time available before the onset of 40mph winds, the radius of the tropical storm force winds and the size of the rainbands are not affected by the forecast.