What is the change in the oxidation number of sulfur in the following reaction?
Bi2S3(s) + HNO3(aq) → Bi(NO3)3(aq) + NO(g) +S(s) + H2O(l)

A. –3 to +2, or +5
B. –2 to 0, or +2
C. +3 to –3, or –6
D. –2 to –3 , or –5