Answer:
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 .