The Processes of Synapsis and the Formation of Chiasmata Does

The processes of synapsis and the formation of chiasmata does not

A) involve reciprocal exchange of chromosomal sections.
B) involve the recombination of DNA on homologous chromosomes.
C) bring about an increase in genetic variation.
D) provide evidence that an exchange of genetic material has occurred.
E) occur for all of the sister chromatids.