A Researcher Is Interested in Studying Gene X, but Not

A researcher is interested in studying gene X, but not gene Y, in Drosophila . What does she need to amplify only gene X from the Drosophila genome? ​

A) some prior knowledge of the gene X sequence so appropriate primers can be designed
B) a heat-stable restriction endonuclease
C) restriction endonucleases that cut gene X but not gene Y
D) a cloning vector that has multiple antibiotic resistance genes
E) a cloning vector that will ligate to gene X but not to gene Y