Recognizing that overloading a parking garage would lead to unsafe conditions, you want to determine the average (mean) weight of vehicles parked in the garage. You choose a sample of vehicles. The next step in the statistical study would be to

A)

weigh each selected vehicle and then find the mean of these weights.

B)

make an inference about the mean weight of all vehicles.

C)

determine the goal of your study.

D)

determine the population parameter and the margin of error.