Which of the Following Features Would NOT Be Considered an Advantage

Which of the following features would NOT be considered an advantage for using organisms such as bacteria and viruses for genetic studies?

A) rapid reproduction and high progeny number
B) haploid genome for expressing mutations
C) complete absence of recombination, which maintains the integrity of the genome
D) low cost to maintain and little storage space required
E) genomes being small and readily subjected to genetic manipulation