Answer:
Explanation:
From the given study,
the molecular formula of the given aromatic compound = C9H12
the first process we suppose to carry out is to calculate the double bond equivalence.
So, the double bond equivalence 

DBE = 4
Hence, the aromatic compound possesses 4 double bonds, this signifies that the might be a presence of benzene ring.
The substitutional products of the aromatic hydrocarbon C9H12 can be seen in the attached file below.
This should be able to help you
C is the answer because that is an actual chemical change where the sulfur and iron are not separate from each other anymore
Hi LianYuLife
Element is a substance that is made up of only one kind of atom
Answer: C) or the third option.