That is not the only option it is
A.5
B.6
C.10
D.180
Based on the options provided:
A. 5
B. 6
C. 10
D. 180
To determine the correct answer, you need additional context or information about the question itself. Without knowing the question, it is impossible to determine the correct option.
If you have the question that corresponds to these options, please provide it, and I'll be happy to explain how to arrive at the correct answer.