What Is the Difference in the Plaque Morphology of R⁺

Multiple Choice

What is the difference in the plaque morphology of r⁺ and r phage on E.coli B?

A) r⁺ is larger than r
B) r is larger than r⁺
C) r⁺ has sharper edges than r
D) r has sharper edges than r⁺
E) None of these