Answer:
B) it is difficult for new entrants to enter the segment
Explanation:
The porters' five forces of industry analysis include threat of new entrants, bargaining power of suppliers, competitive rivalry, bargaining power of customers and substitute products.
When the market is difficult for new entrants for one reason or the other such as the control of the distribution network by already established players in the industry, government regulations or large capital requirements etc the industry will be less attractive.
Other options given are factors that make the industry attractive.