Option 3: (B), (A), (D), (C) -> This is the correct logical sequence showing the impact on a firm's supply curve. It starts with the general principle (B) that any factor affecting marginal cost determines the supply curve. Then it provides a specific example (A) of organizational innovation reducing input usage. This leads to (D) a downward shift in marginal cost, which ultimately results in (C) the firm supplying more units at any given price. This sequence clearly demonstrates the cause-and-effect relationship from determinants to supply curve changes. -> correct