Which of the Following Actions or Behaviours Should Be Avoided

Which of the following actions or behaviours should be avoided in a study employing grounded theory methods?

A) Having "hunches" about emerging patterns before data gathering is completed
B) The researcher expressing his or her opinions or values to the participant
C) Changing how data about experiences are collected or selected after the study has been initiated
D) Expanding codes or data categories as the study progresses