For planning and decision-making, the method that consists in trying out alternatives, is known as

The correct answer is: B. experiment

An experiment is a method of acquiring knowledge that has the following characteristics:

• It is conducted under controlled conditions.
• It is designed to test a hypothesis.
• It is repeated to ensure that the results are reliable.

Experiments are often used in planning and decision-making because they can provide valuable information about the likely outcomes of different courses of action. For example, a company might conduct an experiment to test the effectiveness of a new marketing campaign before launching it nationwide.

The other options are incorrect because they do not meet all of the characteristics of an experiment.

• Experience is not necessarily conducted under controlled conditions. For example, a person might learn from their mistakes, but they might not be able to control all of the factors that contributed to those mistakes.
• A model is a representation of something else. It can be used to test hypotheses, but it is not the same as an experiment.
• None of these is a method of acquiring knowledge.