Misty and Kaci each planted x trees. Their friend planted 2 fewer trees than Kaci.
The total number of trees planted can be found using the expression, 3x−2 .
What does the "3" represent in the expression, 3x−2 ?
A. the number of people planting trees
B. the total number of trees planted
C. the number of trees Kaci planted
D. the number of trees the friend planted