When a Certain String Is Clamped at Both Ends, the Lowest

Multiple Choice

When a certain string is clamped at both ends, the lowest four resonant frequencies are 50, 100, 150, and 200 Hz.When the string is also clamped at its midpoint, the lowest four resonant frequencies are:

A) 50, 100, 150, and 200 Hz
B) 50, 150, 250, and 300 Hz
C) 100, 200, 300, and 400 Hz
D) 25, 50 75, and 100 Hz
E) 75, 150, 225, and 300 Hz