Select the correct passive voice of the given sentence.

She has read all the plays of Shakespeare.

All the plays of Shakespeare have been read by her.

The correct passive voice form of the given sentence "She has read all the plays of Shakespeare" is All the plays of Shakespeare have been read by her.

The active voice of the sentence is "She has read all the plays of Shakespeare." This sentence is in the present perfect tense, which is used to describe an action that has happened in the past and is still relevant to the present. The passive voice of the sentence is formed by putting the subject of the active sentence after the verb "to be" and the past participle of the main verb. In this case, the subject of the active sentence is "she" and the main verb is "read." The past participle of "read" is "read." So, the passive form of the sentence is "All the plays of Shakespeare have been read by her."

The other options are incorrect because:

• All the plays of Shakespeare are read by her. This sentence is in the present tense, but the action of reading all the plays of Shakespeare happened in the past.
• All the plays of Shakespeare were read by her. This sentence is in the simple past tense, which is used to describe an action that happened in the past and is not relevant to the present.
• All the plays of Shakespeare had been read by her. This sentence is in the past perfect tense, which is used to describe an action that happened in the past before another action happened. However, in this case, the action of reading all the plays of Shakespeare is not relevant to the present.