In the following context, how can you replace the verb “enro...

In the following context, how can you replace the verb “enroll” in the options below? “The interviews presented in this article are a portion of a data set from a larger study in which I surveyed 177 students enrolled in a first-year college writing course at a rural, midsize Midwestern state university, asking about their uses of digital tools for nonacademic reading and writing purposes.”