I NEED HELP ASAP TEST DUE IN AN HOUR

1. Iron(II) is 2+ charge and while Iron (III) is 3+. Neither Iron nor Lead can have a charge of 1+ so Iron(I) or Lead(I) is never used since they don't exist

2. Roman numerals are used in naming ionic compounds when the metal cation forms more than one ion. The metals that form more than one ion are the transition metals, although not all of them do this

Explanation:

i think   the answer is c hope i'm right