Which of the Following Is Not True in a Long-Run $P = M C$

question 51

Multiple Choice

Which of the following is not true in a long-run perfectly competitive equilibrium?

• A) \(P = M C\), where \(P\) is market price and \(M C\) is the marginal cost of a firm.
• B) \(P = A C\), where \(P\) is market price and \(A C\) is the average cost of a firm.
• C) \(Q ^ { d } = n q\), where \(q\) is the supply of an individual firm, \(n\) is the number of firms in the industry, and \(Q ^ { d }\) is the market demand for a product.
• D) Firms may earn negative profits.

---

Definitions:

Isotonic Concentric Contraction

A type of muscle contraction where the muscle shortens as it contracts, maintaining constant tension.

Tension

The state of being stretched tight, often leading to stress or strain; in physics, it is the force that pulls materials apart.

Myosin Myofilaments

Protein filaments in muscle cells responsible for the contraction and generation of force.

G-Actin

G-Actin (Globular Actin) is a monomeric form of actin that polymerizes to form F-actin filaments, crucial for muscle contraction and cell mobility.