According to Research Cited in the Text, Which of the Following

According to research cited in the text, which of the following conclusions were drawn from the experiment in which teachers at an elementary school were intentionally misinformed that certain children were extremely intelligent?

A) The teachers went out of the way to avoid treating these students differently, and found no differences a year later.
B) There was no significant impact of the labelling effect of IQ scores.
C) There were marked academic gains among the "so-called" extremely intelligent students.
D) These positive teacher expectations actually created less successful students.