Answer:
The answer is a. Legal barriers.
Step-by-step explanation:
As government granted patent, copyright, trademark for a player in electronics market, they legally protect the intellectual right of that player. As a result, the government also have set up a legal barrier for any potential new players who want to join the market from taking the existing best ideas/ innovation from their starting, instead, they will have to either purchase the patent or invest in R&D for keeping up with the market most modern technology; both at a very high cost.
Ultimately, this type of legal protection will create a barrier to enter for any new player as they will have to prepare for huge expenditure for getting the best technologies at the time.