An increase in the productivity of producing jeans results in
a. the quantity of jeans supplied increasing.
b. the supply of jeans increasing.
c. buyers demanding more jeans because they are now more efficiently produced.
d. buyers demanding fewer jeans because their price will fall, which signals lower quality.
e. some change, but the impact on the supply of jeans is impossible to predict.

The advantage of administering personality tests on employees is that it will allow the employer to know the mindset and personality of the employee. this will allow the employer to at least have an idea as to how the employee works and how his attitude in the workplace. the disadvantage is that it may make the employee a little anxious as to whether he would meet the personality requirements of the employer and whether he would be able to retain the job or not. 

Ithink its 3! hope it : -)

It is answer choice (a.) true.