Scenario:

You are running an A$/$B test to explore whether allowing customers to select their saved credit card information from a menu increases the number of purchases on your site, compared to a version of your site where customers input their credit card information with each purchase. In your A$/$B test, customers who log on between $12$PM and $11$:$59$PM receive the menu$-$based version, and customers who log on between $12$AM and $11$:$59$AM receive the solely text input version.

What is the independent variable?

Group of answer choices

Time customer logs on

Method of input of credit card

Number of customer purchases

Customer preference