Select 2 that apply. Germanium and sulfur combine to form GeSâ‚‚ Select the possible names using both the systematic nomenclature system and the Stock system.
a. germanium(IV) sulfide
b. sulfur digermide
c. germanium(li) suifide
d. sulfur(IV) germide
e. sulfur(II) germide
f. germanium disulfide