15. A solid rod of mass 200 g and length L = 0.50 m is suspended using two strings with equal tensions T1 and T2 as shown below. How far from the left end of the rod should you place a 50 g weight while maintaining the the rod horizontal?
A. 0.10 m
B. 0.18 m
C. 0.25 m
D. 0.35 m
E. 0.40 m