Which revision of these two sentences uses a relative clause?

The orchestra was seated on stage. They played a difficult score.

When they were seated on stage, the orchestra played a difficult score.

The orchestra seated on stage played a difficult score.

The orchestra that was seated on stage played a difficult score.

Playing a difficult score, the orchestra was seated on stage.

The revision of these two sentences that uses a relative clause is "The orchestra that was seated on stage played a difficult score".

Relative clauses are clauses that start with a relative pronoun. In this case, the relative pronoun that has been used is "that" and the relative clause is "that was seated on stage". Furthermore, a relative clause is used to identify or define the noun that precedes it. In this case, the noun identified by the clause is "orchestra". Therefore, the relative clause "that was seated on stage" is postmodifying the noun "orchestra".

The revision of these two sentences that uses a relative clause is "The orchestra that was seated on stage played a difficult score".

Explanation:

I just took the test and that is the correct answer.