What influences the likelihood of whether a person will assist a stranger? In this study, participants were shown four conditions and asked to provide the percent likelihood that they would be willing to help in each condition. The researcher wanted to see if likelihood of helping varies based on the number of bystanders (0 or 10), and/or the gender of the stranger (male or female). Each participant participated in all four conditions (0 bystanders with a female; 0 bystanders with a male; 10 bystanders with a female; 10 bystanders with a male). Question: As taught in 510/515, what is the most appropriate graph if the only significant finding in this scenario is the main effect of # of bystanders? A. Histogram B. Scatterplot C. Bar graph D. Box plot E. Line graph