A string, fixed at its ends, oscillates according to the equation y(x,t) = (3 cm) sin [(π rad/cm) x]sin[(200π rad/s)t]. What is the speed of the two traveling waves that form this standing wave pattern?

• A. v = 200 cm/s
• B. v = 200π cm/s
• C. v = 600π cm/s
• D. v = 200π² cm/s