In terms of the underlying causes of performance problems, leaders seem to have the most difficulty recognizing and rectifying:
a. motivation problems.
b. unclear expectations.
c. employee skill deficits.
d. resource shortages.

A. motivation problems.

Explanation:

The answer is --

A. motivation problems.

A performance problem is drawback in somebody to perform well or work diligently to achieve the desired result. The performance management  for an employee is to help the individual to be successful and bring the desired outcome of the wok on time. But many fails to do so and the the main underlying cause for performance problems is the lack of motivation in people. people are not motivated to work for the desired goal and success.

Thus the leaders finds it very difficult to recognize and rectify the motivational problem in peoples.

Therefore the answer is --

A. motivation problems.

answer; the population in brazil is very diverse there are many races and ethnic groups

every society, in order to meet the needs of it's people, has to answer three basic questions:

- what should we produce?

- how should we produce it?

- for whom should we produce it?

this questions must be answered in order to, option b, aid in production decisions.

every country can't produce everything, no matter how rich their land is. it may be a matter of technology, resources or geographical conditions. so, these three questions must be resolved in order to get the most of the production of each land.

hope this !