A New Research Study Is Published and Becomes the "Hot

A new research study is published and becomes the "hot story" in the news today. This story concerns you because the researchers report that they are the first scientists to find a higher incidence of depression in individuals who are taking a particular vitamin-the same vitamin that your physician has had you taking for years. While this may be cause for you to investigate further, you probably shouldn't panic, because

A) your physician will call you if there is anything to worry about.
B) research like this is rarely accurate.
C) without replication, the finding could just be due to coincidence.
D) unless it was a double-blind experiment, the results are almost certainly in error.