What are the different types of AB Tests I can do in Benchmark Email?

From Name / Subject Line Test - This test measures your recipient's response to different Subject Lines or From Names to determine which variant returns the greatest value Campaign vs. Campaign Test - This test measures your recipient's response to different email campaigns Multiple Variable Test - This test measures your Recipient's response to Multiple Variables in your email campaign including From Name, Subject Line and From Email Address to determine which variant returns the greatest value Delivery Time Test - This test measures your Recipient's response to a single Email Campaign that is delivered at different times to determine which delivery date and/or time returns the greatest value