Exome sequencing is powerful technique that has been used to identify genes linked to a number of rare genetic conditions. Which of the following is a disadvantage of exome sequencing?

A) Exome sequencing only identifies conditions associated with recessive alleles.
B) Exome sequencing does not directly identify the gene, but identifies only the region of the genome containing the gene.
C) Exome sequences are more difficult to analyze than whole genome sequences
D) Exome sequencing does not identify conditions linked to regulatory regions.