The third and fourth sentences are correct!
hope this help:))
If your choices are the following:
A Economic factors and new technologies often lead people to change occupations.
B Most people remain in the same position for their entire working lives.
C It's very rare for people to move to a different company during their careers.
D Changing occupations always means developing an entirely new set of job skills.
Then the answer is A Economic factors and new technologies often lead people to change occupations.
When you are driving within 200-300ft of a vehicle you are following
Management is the big-picture process of making business run smoothly through effective planning, organizing, staffing, training, leading, and controlling the company.