Just as totally relaxed actors or musicians aren’t likely to perform at the top of their potential, speakers think more rapidly and express themselves more energetically when they experience .

helpful speech anxiety    

Explanation:

Speech anxiety: In abnormal psychology, the term "speech anxiety" is described as a condition or situation in which an individual or speaker experiences 'nervousness' during or/and before a specific presentation.

Symptoms of "speech anxiety" involves a dry throat, memory loss, sweating palms, a shaky voice, difficulty breathing, etc. These symptoms are often hard to analyze or predict by the person dealing with it.

In the question above, the given statement signifies helpful speech anxiety.

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.

every society, in order to meet the needs of it's people, has to answer three basic questions:

- what should we produce?

- how should we produce it?

- for whom should we produce it?

this questions must be answered in order to, option b, aid in production decisions.

every country can't produce everything, no matter how rich their land is. it may be a matter of technology, resources or geographical conditions. so, these three questions must be resolved in order to get the most of the production of each land.

hope this !