What Is the Speed of an Average Argon Atom That $\times$

Multiple Choice

What is the speed of an average argon atom that has a de Broglie wavelength of 5.2 pm? (1 amu = 1.66054 $\times$ 10^-27 kg)

A) 0.52 m/s
B) 5.2 $\times$ 10³ m/s
C) 1.9 $\times$ 10³ m/s
D) 1.9 m/s
E) 25 m/s