Which of the following is not a memory illusion?

In developed nations, which of the following is(are) most likely to be lacking in a child's diet?

calcium, iron, and zinc B vitamins magnesium, vitamin A, and vitamin D vitamin C

__________ is a phenomenon in which researchers' hypotheses lead them to unintentionally bias the outcome of a study

a. Durability bias b. Expectancy bias c. Availability heuristic d. Confounding variable e. Confirmation bias