Which sentence uses correct pronoun case after a preposition?

• A. Between you and I, this decision is important.
• B. Between you and me, this decision is important.
• C. Between me and you, this decision is important.
• D. Between I and you, this decision is important.

Answer: (B)

After a preposition, pronouns must be in the object (objective) case. The word between is a preposition, so the pronouns that follow should be in their object forms. In the sentence, you and me are the pronouns after between, and you is the object form as well as me, which makes this choice correct. The other options use the subject form I after a preposition (Between you and I, Between I and you), or mix pronoun forms in a way that doesn’t fit standard pronoun case after a preposition. The standard, most accepted phrasing is you and me after between, which is why this sentence is the best choice.