Which of the following statements about Zen Buddhism is correct?

I.It can be observed only  by Buddhists.

II. It does not require specialized knowledge or study, simply meditation.

III. It is meant to reduce stress and so is attractive to people with high-powered positions. 

IV. Zen Buddhism focuses on the achievement of awareness through clearing the mind of any distractions.

V. Zen Buddhism   has had the most global impact and entered global civilization as a permanent fixture.

VI Zen Buddhism has evolved to such an extent that it has  little in common with  Buddha's fundamental teachings.