In a Single Experiment, Amount of Reward and Type of Reward

Multiple Choice

In a single experiment, amount of reward and type of reward are varied. Subjects are randomly assigned to one of three "amount of reward" groups. Each subject is tested once with one type of reward and once again with a second type of reward. What type of design is this?

A) 2x2 single factor, multilevel
B) 2x3 mixed factorial
C) 2x3 independent groups factorial
D) 3x3 repeated-measures factorial