+1 for
A.
A) Human beings are not well adapted to change and that creates many problems in the workplace because change has become the only real constant in companies today. -->
Correct, idiom usage "adapt to" B) Human beings are not well
adapted for change and that creates many problems in the workplace because change has become the only real constant in companies today.
C) Human beings are not well
adapted for change,
which creates many problems in the workplace because change has become the only real constant in companies today.
D) Human beings are not well adapted to change and that
created many problems in the workplace because change
has become the only real constant in companies today.
E) Human beings are not
adapted for change and that creates many problems in the workplace because change has become the only real constant in companies today.
Hence,
A.