Use the Following to Answer Question

question 11

Multiple Choice

Use the following to answer question:

-(Figure: Unemployment Rate over Time) Use Figure: Unemployment Rate over Time.In the time-series graph,as we move from 1991 to 1993,we see that the unemployment rate has _____ from approximately _____% to approximately _____%.

• A)decreased;5;4
• B)increased;5.5;7
• C)decreased;7.8;5
• D)increased;4;6.3

---

Definitions:

Rebreathing

Rebreathing is the process of inhaling the air that has been exhaled, which can lead to an increase in carbon dioxide and a decrease in oxygen levels in the body.

Bicarbonate Ions

Chemical ions (HCO3-) that act as a major component of the blood's buffering system, helping to maintain the body's pH balance.

Carbonic Acid

A weak acid formed when carbon dioxide dissolves in water, playing a vital role in regulating pH in the blood.

Respiratory Acidosis

A condition occurring when the lungs cannot remove all of the carbon dioxide the body produces, causing body fluids, especially the blood, to become too acidic.