Describe the role of a person's native language in simultaneously facilitating and interfering with second language acquisition. a. cognitive principles b. linguistic principles c. executive principles d. affective principles

I believe the answer is: linguistic principles
linguistic principles would regulate the framework in which an arrangement of words could be considered as 'acceptable' for a langage.
This would include things such as accordance with general principle (grammar) , syntax, and other language parameters.

Complementary goods. they go together, thats why one price increase and the others demand increases