What should be changed to make the following sentence true? According to the Schachter-Singer law, simple tasks are performed best when arousal levels are relatively high, and complex tasks are performed best when arousal is low.

(a) - change the phrase "Schachter-Singer" to the phrase "Yerkes-Dodson"

(b) - change the word "high" to the word "moderate"

(c) - change the word "law" to the word "theory"

(d) - eliminate the word "Singer"

A). Change the phrase "Schachter-Singer" to the phrase "Yerkes-Dodson."

Explanation:

In the given phrase, the change that should be done to make it true is that replacing the phrase "Schachter-Singer" to the phrase "Yerkes-Dodson" as it would propose the appropriate sense to the passage. The phrase "Yerkes-Dodson" is appropriate to the context of the passage instead of "Schachter-Singer". Thus, option A is the correct answer as it correctly replaces the incorrect word with the correct one.