Alexandra is trying to campaign for a $1 raise in her allowance. She has made up a Power Point to show her parents, and want to make a bar graph of the allowances of the 35 kid in homeroom. Their allowances range from $3 per week to $8.50 per week. Which unit would make sense for each box of the bar graph to represents?
A. $10
B.$1
C.0.25
D.$0.01