In terms of the Job Characteristics Model, feedback refers to the extent to which $\_\_\_\_\_.$

a$.$ a job requires a variety of skills to carry out the tasks involved in the job and its duties

b$.$ employees are given the authority to make decisions

c$.$ a person receives clear information about performance effectiveness from the work itself

d$.$ a job requires a variety of skills to carry out the tasks involved

e$.$ performance appraisals are perceived as transparent and fair by employees