How can you distinguishes lymphatic vessels from veins?

In hershey and chase’s experiment investigating which biological molecule carries genetic information, they found that phage dna with radiolabeled phosphorus was retained in bacterial cells after transduction. to conclude that dna is the genetic material, what assumption did they have to make? a. protein does not enter the bacterium during transduction. b. dna does not stay in the media after transduction. c. all of the phage dna was radiolabeled. d. bacteria can be transduced by phage.