You should use brief examples:

You should use brief examples:
 
  a. sparingly for extra impact
  b. in almost everything you write
  c. in about a third of your business correspondence
  d. in about two thirds of your business correspondence

Ques. 2

Examples:
 
  a. are hard to overuse
  b. help readers understand abstract points
  c. both of the above
  d. none of the above

Ques. 3

A narrative example:
 
  a. is longer than a brief example
  b. is not necessarily longer than a paragraph
  c. both of the above
  d. none of the above

Ques. 4

An example is:
 
  a. abstract
  b. concrete
  c. both of the above
  d. none of the above