Answer:
d. dependent variable
Explanation:
In research, the independent variable is the variable that can be manipulated by the researchers and which will have an effect on another variable that is called the dependent variable. (Therefore, the variable in which the affect is perceived is called the dependent variable).
The researchers don't really have control over the dependent variable but it is the one that it's being tested and see how it responds to the independent variable.
In this example, the researchers want to see if depression has an effect on the negative emotions being remembered. We can see that they want to see if depression will have this effect. Therefore, since depression might affect the remembering of negative emotions, the negative emotions would be the dependent variable.