Which sentence correctly uses a predicate pronoun as a subject complement? A The last arrivals were Joe and I. B This year's soccer champions were Lana and me. C The tribute deeply touched my brothers and I. D My boyfriend became my best friend.

A and B are both correct.

A predicate includes the verb and the words that follow--for example "were Joe and I" and "were Lana and me". "were" is a linking verb, so even though it doesn't feel like an 'action word', it still counts as a verb.

A pronoun takes the place of a noun: "me" and "I" are both pronouns.

A subject complement renames/redefines the subject of the sentence. "last arrivals" and "soccer champions" are the subjects of each of their sentences. "Joe and I" and "Lana and me" redefine the subjects to make it a little clearer who the sentence is talking about.

So, "I" and "me" are both predicate pronouns that successfully act as subject complements.