Preconceived assumptions made by managers regarding their workers result in violations of fair: a) labor laws. b)self-fulfilling prophecies. c)better performing employees. d)difficulties with job performance evaluations.

The correct answer is letter "A": labor laws.

Explanation:

Labor laws are the set of legal rules employers must follow to promote an equalitarian job environment. The right to be free from discrimination, to work in a safe work frame, to be free from retaliation, and to have access to a fair wage are the basic rights employees must make respect.

Preconceived assumptions could lead to discriminating individuals because of certain features like race, religion, sex or political ideology. Thus, preconceived assumptions lead to managers breaking labor laws.

answer; 20% is your answer;

answer: a. the kind of population living in your neighbourhood.

the census explorer data tool by the us census bureau allows the user to zoom in on any neighbourhood within the united states and find the kind of people residing in that by race and age.  

the tool needs to needs to be used twice – once in order to find what type of people reside in a neighbourhood, and then to see the age groups of the people in the same neighbourhood.