[单选题]
A diatomic molecule 9a5gxn1afr40:w tslia37 i,/wslbhg ulu/1 *qz fx/n n438kiz zngw,has $18 \times 10^{-5} \; eV$ of rotational energy in the L = 2 quantum state. What is the rotational energy in the L = 0 quantum state?
A. $9.0 \times 10^{-5} \; eV$
B. $6.0 \times 10^{-5} \; eV$
C. $3.0 \times 10^{-5} \; eV$
D. $0 \; eV$