A Researcher Might Use Site-Directed Mutagenesis Because

A researcher might use site-directed mutagenesis because

A) spontaneous mutations occur too frequently to study.
B) using a mutagen yields results that are specific to a gene and not applicable everywhere in the genome.
C) mutation can happen at a specific site in the genome,compared to a mutagen that might cause mutations in several genes.
D) it works in humans but not in experimental organisms or cell culture.