The “predicate” is defined as the clause in the part of a sentence with verb. This is representing about features of subject.
In the above given statement, “heard the conductor’s statement” is considered as sentence that supports verb- “attended” at concert.
Thus, the options (d), (b) and (a) are incorrect.
In the above given statement, “heard the conductor’s statement” is considered as sentence that supports verb- “attended” at concert.
Therefore, the correct option is – c. heard the conductor's announcement.