. If the variance of grades in an Economics course is 25, each student should unconditionally expect their grade to deviate from the class average grade 50 points 20 points 10 points O 5 points 8. The costs of an economic activity borne by the producers are... Always less than social costs O The entire resource costs of the economic activity O Private costs O None of the above 9. Which of the following individuals is considered officially unemployed? Person A, who has not worked for more than five years and has given up looking for work O Person B, who is going to university full-time and is waiting for graduation before looking for a job Person C, who recently left a job to look for a new job Person D, who is retired after turning 65 two months ago