If a firm doubles all of its inputs and its output triples, it is said to be experiencing

A) diminishing marginal returns.
B) increasing marginal returns.
C) diseconomies of scale.
D) economies of scale.
E) constant average costs.

Tripling Output

The act of increasing the production or output of goods and services threefold, signifying significant growth or scaling up of operations.

Economies of Scale

Cost advantages companies experience when production becomes efficient, as the cost per unit of output decreases with increasing scale.