A researcher would like to use a factorial study to compare the service provided by two different cell phone companies. Participants will be asked to rate the quality of service provided for basic...

A researcher would like to use a factorial study to compare the service provided by two different cell phone companies. Participants will be asked to rate the quality of service provided for basic phone calls (talking and texting) and for Internet access. Thus, the two cell phone companies make up one factor, the two types of service make up the second factor, and the participants’ ratings are the dependent variable. For this study, which factor(s) should be between-subjects and which should be within-subjects? Explain your answer.