Answer:
productively efficient outcome uses the least cost. input mix required to produce a given output of any good or service. This concept goes beyond technical efficiency, which is the lowest volume of inputs per unit output for each possible combination of inputs, as it takes into account the prices of the inputs.
Lowered costs because it caused more competition and increased the size of the economy as a whole.
Use what they know and other resources to determine how credible the current source is
