What prevents self-actualization from being more common?

What prevents self-actualization from being more common?
 
  A) people's desire for safety
  B) people's desire for approval
  C) unmet lower-order needs
  D) all of the above

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Question 2

In his survey of 3,000 college students, about how many did Maslow find whom he considered to be
  self-actualized?
 
  A) one student
  B) two percent (60 students)
  C) ten percent (300 students)
  D) fifty percent (1500 students)

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Question 3

In order of their emergence, the needs in Maslow's hierarchy are
 
  A) physiological, safety, esteem, love, self-actualization.
  B) physiological, esteem, safety, love, self-actualization.
  C) physiological, safety, love, esteem, self-actualization.
  D) safety, physiological, love, esteem, self-actualization.

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Question 4

Positive psychology emphasizes people's psychological growth and happiness.
 
  Indicate whether the statement is true or false.