Scenario 15-1 Consider a Transportation Corporation Named Reading's That Has Just Completed

Scenario 15-1
Consider a transportation corporation named Reading's that has just completed the development of a new light rail system in Minneapolis. Currently, there are plenty of seats on the train, and it is never crowded. Its capacity far exceeds the needs of the city. After just a few years of operation, the shareholders of Reading's experienced incredibly high rates of return on their investment due to the profitability of the corporation.
-Refer to Scenario 15-1. Which of the following statements is most likely to be true? i) New entrants to the market know they will have a smaller market share than Reading's
Currently has.
Ii) Reading's is a natural monopoly.
Iii) Reading's is most likely experiencing increasing average total cost.

A) i) and ii) only
B) ii) and iii) only
C) i) and iii) only
D) i) , ii) , and iii)