Answer: c. What were the incentives for him and the other student to behave the way they did?
Step-by-step explanation:
Variables represent something to be measured. Analyzing the relationship between variables aims to determine whether or not an independent variable displays any alterations in the dependent variables.
In this case, the independent variables are the incentives both of the students had to behave the way they did. The other options refer only to OkubeĀ“s incentives or the influence of only one independent variable (the possible self-consciousness about having people watching).