Conditions that keep new firms out of a monopoly market are:

A) barriers to entry.
B) terms of sale.
C) labor market stipulations.
D) production controls.

Barriers to Entry

Factors that make it difficult for new firms to enter a market, such as high initial investment, complex regulation, or strong incumbent competition.

Monopoly Market

A market structure characterized by a single seller controlling the entire market supply of a product or service.

Terms of Sale

The conditions and stipulations under which a sale is conducted, including payment, delivery, and warranty details.