A stock person at the local grocery store has a job consisting of the following five segments:( 1 ) ...

A stock person at the local grocery store has a job consisting of the following five segments:
   ( 1 ) picking up boxes of tomatoes from the stockroom floor
   ( 2 ) accelerating to a comfortable speed
   ( 3 ) carrying the boxes to the tomato display at constant speed
   ( 4 ) decelerating to a stop
   ( 5 ) lowering the boxes slowly to the floor.
During which of the five segments of the job does the stock person do positive work on the boxes?
A) ( 1 ) and ( 5 )
B) ( 1 ) only
C) ( 1 ), ( 2 ), ( 4 ), and ( 5 )
D) ( 1 ) and ( 2 )
E) ( 2 ) and ( 3 )