Why reason best illustrates why Hershey and Chase chose to use viruses in their experiments?

They used viruses because they infect a bacterium by inserting their DNA, resulting in the bacteria reproducing the virus.

Explanation:

They did experiments to confirm if DNA is the base of the genetic material, for this they used a phage, which has only one capsid where the genetic material is found. This experiment confirmed that DNA was the support of the hereditary material.