【简答题】A.Determine the characteristics of the job. B.Determine the basic skills the job requires. C.Understand the nature of the job. D.Understand the management of the job.
【单选题】If the number of baseball games in a city and the amount of violent crime is positively correlated, why is it not safe to conclude that baseball games cause violent crime?
A.
Baseball is seasonal, whereas violent crime happens all the time.
B.
That conclusion would be generally unpopular.
C.
Playing baseball actually causes a reduction in violent crime.
D.
A third variable could be causing the increase in both.