Refer to the exhibit.
R6 should reach R1 via R5>R2>R1. Which action resolves the issue?
A. Increase the cost to 61 between R2-R3-R1
B. Increase the cost to 61 between R2 and R3
C. Decrease the cost to 2 between R6-R5-R2
D. Decrease the cost to 41 between R2 and R1
