Demetrius's family recently immigrated to the United States from the Ukraine.After he attended kindergarten,his parents noticed that his English was more fluent than his native language.Demetrius was exhibiting:

A) a language shift.
B) accelerated bilingualism.
C) a vocabulary explosion.
D) linguistic egocentrism.

Language Shift

The process by which a speech community in a contact situation (such as migration) gradually stops using their original language in favor of another language.

Accelerated Bilingualism

The rapid acquisition of proficiency in two languages, often facilitated by immersive or intensive language learning environments.

Vocabulary Explosion

The rapid increase in a child's vocabulary, often observed between the ages of two and six years.