GENUS plc, an agricultural firm, values the pigs in its pure line herds, which are the repository of its proprietary genetics, as a single unit of account. It does this using a discounted cash flow model, applied to the herds' future outputs at current prices. Which valuation technique is being used? Select one: a. Cost approach b. Market approach c. Income approach d. Level 1 e. Level 2 f. Level 3