A/an is a systematic procedure that to arrive at a solution for a particular problem. it can with an arithmetic or a logical problem by breaking it down into a set of definable steps.

An Algorithm  is a systematic procedure that helps to arrive at a solution for a particular problem.

Explanation:

While finding an answer, the right procedure is always the primary key to getting the best answer. Therefore, a problem solving approach is regarded as an algorithm; this is the process of finding a solution by going through it while implementing every step to land at the correct choice.

You follow instructions right; it is a guarantee that you will arrive at the correct answer. Therefore the term can also be applicable in pure mathematics to find the right answer or when making a crucial decision.

the answer is b, encourage free trade