The answer is B (An app on your smartphone that tracks the nutritional status of foods you eat)
Answer:
Random assignment.
Explanation:
Random assignment (also known as random allocation, or randomization), in psychology experiments, is randomly selecting participants or units by the use of chance procedures so that each participant or unit has the same chance (equal likelihood) of being assigned to any particular control or treatment group.
Answer:
Frequent and thorough hand washing and foot care is a good way to prevent germ or fungus buildup. Nails that become too long and/or are rough and torn can scratch and cut an individual's skin and may result in a local infection.
Paranoia, hallucinations, talking nonsense words, delusions.
This questions is quite open, so options are endless.
Parental neglect I think is the answer