Answer:
C. A firm that uses more labor and less capital than another firm cannot be technologically efficient
Explanation:
"Technological efficiency" is different from "economical efficiency."
Technological efficiency focuses on having the least amount of inputs in hitting the maximum output. Economical efficiency focuses on having the least amount of cost in hitting a maximum output.
Choice c mentioned about "more labor" so, this shows that it is not technologically efficient because it has more inputs. It should include only the fewest number of labor, since it is the concern of a technologically-efficient firm (and not the cost).
This also shows that a "technologically-inefficient method" can be "economically-efficient."