Question: I dont know if its b or d. please help ASAP All firms that produce a particular output :1 have the same following long-run cost

I dont know if its b or d. please help ASAP

All firms that produce a particular output :1 have the same following long-run cost function: c(q):q3- taVEd 3q2 +(25/4)q. The aggregate demand function from the consumers for this output is D(p):155p. wt of There are no barrier to entry or exit in this purely competitive industry. There are now currently 90 firms in the industry. Will the number of firms in the industry increase of decrease? O a. It will stay the same 0 b. It will increase 0 c. None of the other answers. Q d. It will decrease

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