In a Research Study (Reeder Et Al

In a research study (Reeder et al., 2004) participants were asked to read a story about a student, Sara, helping a professor move heavy books and journals. The results of this study found that

A) in all of the conditions, Sara was described as altruistic.
B) participants who were told that Sara helped for an ulterior motive, rated her as more altruistic.
C) participants who were told that Sara volunteered to help described her altruistic behaviour as motivated by external factors.
D) when an ulterior motive was provided, Sara's altruistic behaviour was described as motivated by external factors.