Researchers at a pharmaceutical company are studying a new drug's effectiveness in reducing depression and are specifically interested in whether or not the drug is more effective than a placebo pill given to some participants. What may be the BEST type of treatment study for them to use?

Match the deficiencies with their proper definitions: 1. deficiency disease 2. niacin (b3) deficiency 3.vitamin a deficiency 4.vitamin b1 deficiency 5.vitamin d deficiency 6.vitamin c deficiency a. abnormal conditions due to the absence of specific substances usually found in a normal diet b. susceptible to infection, partial or complete blindness, unhealthy skin c. fatigue, depression, irritability, low blood pressure, loss of appetite d. inflammation of the mouth, sores around the mouth, red and thickened skin, diarrhea, vomiting, etc e. weakness, bleeding into tissues, excessive bruising, softening of bones f. bones not normally hardened and become bent or twisted (answer format ex. 1 - a, 2 - b, 3 - c, etc.) will award brainliest

Ireally need to know this answer asap

By signing the patient’s ehr with the digital signature, the provider certifies that all data and information in the patient ehr is: