Question: Cummins' (1978) Interdependence Hypothesis states that: Need Assignment Help? A. L2 proficiency might vary depending on how cognitively demanding and context-reduced the type of communication is B. Learning to read in one language will interfere wit reading development in another language C. Positive cognitive effects are found only at high levels of L1 and L2 proficiency and with balanced bilingualism D. Language and literacy skills in L1 are shared with and can transfer to L2 because they are based on the same linguistic-conceptual knowledge