Which of the following are true of ‘performance’, as used in linguistic theory?

A. It is analogous to the Saussurean concept of langue.

B. It refers to the specific utterances of individual native speakers in actual situations.

C. It is an innate grammar that suggests humans’ universal ability to use language.

D. It includes hesitations and unfinished structures arising out of psychological difficulties acting upon the speaker.

Choose the correct answer from the options given below: