In recent years, a certain area of the world has experienced greater shifts in weather patterns. For example, there are many nights during which the temperature gets below freezing, but many days that are very warm. These shifts have made it difficult to grow and harvest crops. Which advantage of genetic technology would be most helpful in solving this problem?

A increased nutritional value of crops
B increased resistance to environmental factors
C greater resistance to crop-killing diseases
D greater resistance to insecticides