What Is the Difference Between Genetic Dissection and Genome Sequencing

What is the difference between genetic dissection and genome sequencing?

A) Genetic dissection reveals information about one gene at a time and genome sequencing reveals information about all the genes in a genome at once.
B) Genetic dissection experiments can be accomplished in any species and genome sequencing is only possible in model organisms.
C) Genetic dissection depends on the availability of mutations in model organisms and mutations are of no use in the study of genomes by genome sequencing.
D) The genetic dissection approach is affordable and genome sequencing is prohibitively expensive.