Recall the Application About Wireless Women in Pakistan,why Is the Market

Recall the application about wireless women in Pakistan,why is the market for phones services perfectly competitive?

A) Thousands of Pakistan entrepreneur women sell phone services to the neighbors that each takes the market price as given.
B) The market of phone services has barrier to entry and many women in Pakistan have trouble getting services due to the shortage in supply.
C) The initial investment would be millions for entering the phone business in the Pakistan,and will keep the numbers of suppliers low.
D) none of the above