in terms of Porters 5 Forces model, barriers to entry make it difficult for:

Select one:

a. A customer to enter a store

b. A customer to purchase a product

c. A new business to start in a particular industry because it needs capital and/or physical space and/or suitably qualified personnel and/or the correct technology in order to commence trading

d. A new business to start in one location because there is no demand for its products and services