选择题
1999 AMC 8 Problem 20: Stack Map Front View
A stack map gives the number of cubes stacked at each position. For the stack map in Figure 4, the back row has heights 2, 2, and 4, and the front row has heights 1, 3, and 1. Which answer choice is the front view?
A.
A
B.
B
C.
C
D.
D
E.
E