An Important Advantage of Having Two Gene Loci (κ and λ)For

An important advantage of having two gene loci (κ and λ) for the light chain is

A) that the likelihood of a successful rearrangement of light-chain genes increases.
B) that immunoglobulins are homogeneous and not heterogeneous in mature B cells.
C) that different effector functions are conferred by the two different light-chain loci.
D) that surrogate light-chain transcription cannot compete with κ and λ transcription and enables B-cell development.
E) all of the above.