Bill is fearful of most social situations, whereas Andrea is only fearful of giving speeches. Given this, one could infer that

Bill's fear began at an earlier age.

Bill may be more likely to abuse alcohol.

Andrea has less impairment.

Explanation:

As per the question above, Bill is experiencing social phobia whereas Andrea is experiencing specific phobia.

Social phobia: In abnormal psychology, the term social phobia is also denoted as "social anxiety disorder" and is described as one of the types of anxiety disorder that leads to developing extreme fear in any social setting or gathering. An individual who is experiencing social phobia has trouble while talking to people, attending social settings, and meeting new people. He or she fears of being scrutinized by someone else.

Specific phobia: It is described as an individual's irrational & intense fear of something that consists of little or no relevant danger. It develops severe anxiety in individuals experiencing it.

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.

answer; ( whites);