Select the correct passive form of the given sentence.
The cat ate all the pastries.

The correct passive voice of the given sentence is (b) All the pastries were eaten by the cat.
Definition:
· Active voice: The subject performs the action.
· Passive voice: The subject receives the action.
Structure:
· Active: Subject + Verb + Object
· Passive: Object + Appropriate form of "to be" + Past Participle + by + Subject
Active voice: The cat ate all the pastries.
Passive voice: All the pastries were eaten by the cat.
Tense Rule:
· Active (Simple Past): ate
· Passive (Simple Past): was/were + past participle