People often enter psychotherapy during a period of crisis in their lives. This helps us understand why they

Explanation:

People often enter psychotherapy during a period of crisis in their lives,this helps to understand that they tend to overestimate the effectiveness of their psychotherapy

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.