Luther Burbank bred potatoes that combined a variety of useful traits. One of Burbank's breeding techniques was hybridization. Which cross of potato plants would have been MOST USEFUL for producing a useful strain by hybridization?
O A a disease-resistant plant crossed with a plant that is not disease resistant
O B. a plant that is not disease resistant crossed with a plant that produces a low volume of food
O c. a disease-resistant plant crossed with a plant that produced a low volume of food
O D. a disease-resistant plant crossed with a plant that produced a high volume of food