Read the following article and mark the letter A, B, C, or D to indicate the correct option that best fits each of the numbered blanks from 1 to 6.

The term 'personal development' is often connected with activities like dieting or exercise, or perhaps learning a ___(1)___ . But while these things are undoubtedly important, there are many other ___(2)___ skills which are often overlooked. Academic or cognitive skills ___(3)___ critical thinking, memorisation and creativity are important, as are ___(4)___ and emotional skills like friendliness, positive thinking, and self-esteem.
___(5)___ skills not to be neglected include self-control, time management, and finding a balanced life. The important thing is to ___(6)___ a 'holistic approach' to personal development, meaning you should aim to develop yourself as a whole person rather than focusing on one aspect of yourself at the expense of the others.
(Adapted from C21 Smart)