Cotransductant Bacteria Can Occur If

Cotransductant bacteria can occur if

A) a bacterial cell picks up two fragments of DNA from the environment,each with a different gene.
B) double crossover occurs between prophage DNA and the bacterial chromosome.
C) two genes are closely linked enough so that they can be packaged into a phage head and injected into a cell by a single phage.
D) two genes are introduced into the same bacterium by simultaneous infection with two different phages.
E) Both C and D