Childhood experiences that can lead to the development of unhealthy beliefs and can cause feelings of anxiety are:

a) being criticised or put down regularly and lack of encouragement of assertive behavior
b) recreational drugs
c) poor nutrition
d) environmental influences
Which letter is correct

a) being criticised or put down regularly and lack of encouragement of assertive behavior.

The correct letter is "a" - being criticized or put down regularly and lack of encouragement of assertive behavior.