According to developmental psychologist k. warner schaie, the period in middle adulthood when people take a broader perspective than earlier, including focusing more on concerns about the world, is called the stage.

The correct answer would be, Executive Stage.

Explanation:

There are many stages during the period of adulthood when people develop they perspectives about certain things. These stages may include the executive stage, acquisitive stage, responsible stage and reintegrative stage. So according to the developmental psychologist, K. Warner Schaie, the period in the middle adulthood when people take a broader perspective than earlier, is called as the Executive stage. This stage includes focusing more on concerns about the world. Broader perspectives are developed by people in the executive stage of middle adulthood.

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."