Dangerous bears are in woods be careful OK you never know
I believe him,her or them would be a proper way to fill in the blank. Her or him both refer to a person the same way but with their separate genders. When referring to "them" you could mean a company, a family, or small business.
Assuming that the pronoun in bold type is 'that', the answer would be a relative pronoun, because it relates, or refers to the noun 'opportunities'. It can be replaced with 'which'.
Answer:
D. You have media balance when you participate in activities you enjoy both online and offline.
I think you should pick he as the answer because he in my belief I prefer that as the best answer and so as my friends next to me