The correct answer is b. Effectiveness means producing the desired result.
The ability to deliver the desired outcome or result is what is meant by effectiveness. Effectiveness is the quality of having an intended or anticipated result or leaving a lasting, profound impression. Effectiveness and the phrases efficacy, efficiency, and effectivity may occasionally be used interchangeably. The phrase "being highly effective or not very effective" is occasionally used to quantify the word "effective." Effectiveness and effectiveness, however, do not provide information regarding the nature (positive or negative) and comparison to a reference point of the effect at hand. Contrarily, effectiveness refers to the degree to which a desired effect is realized, the capacity to generate a desired quantity of the intended result, or the accomplishment of a certain objective.
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