Astore that sells a huge variety of one type of product, such as books, in order to dominate the market for that product is called a store.
a. saturation center
b. category killer
c. fine-line shaper
d. market mover

b. category killer store

Explanation:

Category killer store -

It is a type of huge retail chain store , which is very competitive and dominates the market and does not have less productive and specialized merchants , is known as category killer store .

They have massive competition , because they have huge stores all across , and hence these stores sell product at a much lower cost in comparison to other stores , and hence becomes cost - efficient .

These type of stores have various options and hence , people need not go to anywhere else to find a particular item , and therefore , people prefer a category killer store , over others .

the third answer is correct.