Correct option is A
A is true, but R is false.
All children who enter school are highly competent language users and have a well-defined vocabulary. They have a natural curiosity to grasp new things.
The term diversity indicates that a group of people is made up of individuals who are different from each other in some way. In a language class, most of the students come from diverse linguistic and cultural backgrounds.
Due to language and cultural diversity, children are unable to demonstrate their language abilities as in this case the diversity becomes a language barrier.