They usually contain a diuretic. A diuretic increases the amount of water lost from the body. Since the body is made up of 80% water, the person will see some weight loss. Once the person stops taking the supplement the weight will be regained quickly.
Cognitive behavioral therapy usually involves a therapist talking to a patient and guiding the conversation to discover maladaptive thought patterns then teaching the patient techniques to help deal with those thoughts in an effort to see change a behavior.
The answer to your first question is D. Three months. The reason why is it takes at least 3 months to have detectible HIV antibodies. In rare cases, it may take up to 6-12 months.
The second question I'm not 100% positive on but I believe the answer would be B.
The sensorimotor stage is defined by the young child's dependence on his or her senses to explore the world.