In the Study Mueller and Oppenheimer (2014), Some Participants Took

In the study Mueller and Oppenheimer (2014) , some participants took hand-written class notes whereas others took notes on a laptop. The researchers wanted to know the type of note-taking influenced memory for material. What was the design?

A) single-factor, independent groups design
B) single-factor, matched groups design
C) multilevel, independent groups design
D) multilevel, matched groups design