In 1952, the american scientists martha chase and alfred hershey identified dna as a cell's hereditary material. what was the technological effect of this scientific breakthrough? a. the development of genetic engineering b. the invention of vaccines c. the development of mechanical hearts d. the discovery of antibiotics

"The Hershey-Chase experiment was a series of experiments, conducted in 1952 by Alfred Hershey and Martha Chase. It identified DNA to be the genetic material of phages and, ultimately, of all organisms. Before this experiment was conducted, it was suspected that proteins were the genetic material in viruses, not DNA. A bacteriophage is a small virus that infects bacteria. It consists of a protein coat that encloses the genetic material. When a phage infects a bacterium, it inserts its genetic material into the bacterium, while its coat remains outside." ~https://br.answers.yahoo.com/question/index?qid=20080328174055AAMvFCw   maybe this can help 

They must use the scientific method