Answer the questions...no need detail explanation

Question 1

For which of the following population parameters is sampling not necessary? A. The average shelf life of canned food produced by a manufacturer B. The average height of Miss Universe winners C. The average content of potato chips produced by a manufacturer D. The percentage of public school teachers who pursue postgraduate studiesThe owner of a company has recently decided to raise the salary of one employee, who was already making the highest salary, by 20%. Which of the following is(are) expected to be affected by this raise? A. Mean only B. Median only C. Mean and median only D. Mean, median, and mode