Which among the following is true about corpus linguistics?

A. It is a collection of naturally occurring spoken and written texts.

B. It has ensured the supremacy of speech over writing.

C. It is about the teaching of linguistics at the school level.

D. It is a methodology that involves computer based empirical analysis of language use.

E. It is a branch of linguistics that is purely based on Chomskyan linguistics.

Choose the correct answer from the options given below: