Direction: Study the following information and answer the question that follows.
A - B means A is 4 km to west of B.
A + B means A is 4 km to north of B.
A * B means A is 4 km to south of B,
A # B means A is 4 km to east of B.
R + Q # M + X - W * C, what is the shortest distance between R and C?
1
4
2
5
3
0
4
- 4