There Are a Number of Toothpastes Marketed Under the Crest

There are a number of toothpastes marketed under the Crest brand including Cavity-protection Crest,Sensitive-teeth Protection Crest,Baking Soda Crest,Tarter Protection Crest,and Crest for Kids.The large variety of toothpastes under the Crest brand is an example of a:

A) marketing mix
B) product line
C) product mix
D) product equity
E) product modification