Option A
Total number of cookies on a shipping truck when 12 boxes are loaded is 1728.
Solution:
Need to determine correct option of total number of cookies on the truck 
From given information 
Number of cookies in 1 container = 12 
Number of container in 1 box = 12 
So number of cookies in 1 box = number of cookies in 12 container 


Number of boxes loaded onto 1 shipping truck = 12 
So Number of cookies onto 1 shipping truck = number of cookies in 12 boxes 


Hence total number of cookies on a shipping truch when 12 boxes are loaded is 1728. Thus option A is correct