Answer:
Strain theory states that social structures within society may pressure citizens to commit crimes.
Explanation:
The correct answer is negatively reinforced.
Negative reinforcement refers to a learning process whereby a behavior or response is reinforced and much more likely to be repeated in the future if a negative outcome is avoided or removed as a result of performing the behavior. In this instance, Brian's avoidance of singing is being negatively reinforced because avoiding singing is removing his feelings of anxiety associated with singing and being in the spotlight.
C) availability and popularity
C. to describe how proteins are produced (i believe)
<span>The Crusades introduced Europeans to new goods and ideas.
Marco polo contributed to trade by spending 20 years traveling Asia.</span>