Answer:
D. a percentage of their salaries
Explanation:
This is based on the spoil system which explains or is been described as a system where campaign workers of the sitting government are been offered civil service positions as compensation to their endeavours during the campaigns/rally. This is sometimes referred to as the patronage system too. That is why jobs and government positions gained through this system are expected to contribute a percentage of their salaries. Changes in party that are in control of government sometimes also brings new government workers carrying political responsibility.
The study of cognitive skills, moral reasoning, and social behavior across the lifespan is known by developmental psychologists,
Developmental psychologists study human growth and development over a lifetime, including physical, cognitive, social, intellectual, perceptual, personality, and emotional growth. Developmental psychologists working in universities typically focus primarily on research and teaching.
Developmental psychology is the scientific study of how and why people grow, change, and adapt throughout their lives. Initially concerned with infants and children, the field has expanded to include adolescence, adult development, aging, and the entire life span.
Learn more about Developmental psychologists here: brainly.com/question/1826222
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