Please help if you want brianleist!! :) uhm don't mind update- NO LINkS- Thank you to those who help! :)

Answer:
D. 3600ft^3
Step-by-step explanation:
First you have to find the volume of one box:
Volume = Length*Width*Height
Volume = 48ft^3
Multiply 48 by 75 to find the volume of 75 boxes:
48*75 = 3600ft^3