In an examination of the relationship between SAT scores and college performance, your text authors note that one of the factors that may contribute to the appearance of a low correlation is .

restriction of range  

Explanation:

In an examination of the relationship between SAT scores and college performance, your text authors note that one of the factors that may contribute to the appearance of a low correlation is restriction of range.  Restriction of range occurs when observed sample data are not available across the entire range of interest. The impart of this on correlation is that when data have restricted range of score, it causes a reduction in correlation coefficient.

the answer is either c or d i think its d

answer; validity;