DNA Microarrays Have Had a Huge Impact on Genomic Studies

DNA microarrays have had a huge impact on genomic studies because they

A) can identify the function of any gene in a genome.
B) can be used to introduce entire genomes into bacterial cells.
C) allow the expression of many or even all of the genes in a genome to be compared at once.
D) allow physical maps of the genome to be assembled in a very short time.
E) dramatically enhance the efficiency of restriction enzymes (endonucleases) .