Respuesta :
After the assembly, teachers and students are able to meet Tommy the Clown is the sentence that correctly uses the agreement rule that applies to compound subjects joined by and.
The correct answer between all the choices given is the last choice or letter D. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.
D. After the assembly, teachers and students are able to meet Tommy the Clown.
The compound subject of this sentence is "teachers and students". The verb "are" agrees with the compound subject. Option A is wrong because "is" doesn't agree with the compound subject. Option C is wrong because the question asks for a subject with "and", but Option C's subject uses "or" to connect the compound subjects. Option B is wrong because the subject is parents, and it is not compound.