A bacterial sample was contaminated with an unknown preparation of vector DNA.In order to identify the vector,the bacteria was streaked on a plate and incubated overnight.Examination of the plate revealed at least 120 clear plaques.Which of the following is a plausible conclusion?
A)The vector could be a plasmid. B)The vector could be a phage. C)The vector is a Ti. D)The vector is puc18. E)The vector is a cosmid.