The correct option is C Gene splicing
Gene splicing
Gene splicing is the technique of separating a desired gene from an organism using restriction enzymes and inserting it into the vector.
Gene cloning
Gene cloning is a method of molecular biology used to make multiple copies of a particular gene of interest. The gene of interest is inserted into a self replicating vector DNA via genetic engineering to form a recombinant DNA (rDNA). The rDNA is then inserted into a host organism to make clones of the gene of interest.
Genetic drafting
In genetic drafting an allele changes frequency not by itself under natural selection, but due to the effect of its nearest gene in the same DNA that is undergoing a change in frequency.
Final answer:
a. Gene splicing