For HCl represented as a harmonic oscillator, it has a vibrational frequency of 2885 cm-1. The vibrational frequency of DCl (where D is twice the mass of H) should be (assuming HCl and DCl have the same force constant):
A) 4025 cm-1;
B) 1443 cm-1;
C) 2040 cm-1
D) 2068 cm-1;
E) 2885 cm-1