Which statement best describes the difference between an activity list and an activity attribute?

Which statement best describes the difference between an activity list and an activity attribute?

An activity attribute provides more schedule$-$related information about each activity than an activity list.

As opposed to an activity attribute, an activity list provides resource requirements and constraints related to activities.

An activity list provides a more concrete list of milestones for a project than an activity attribute.

An activity attribute is a tabulation of activities to be included on a project schedule whereas an activity list is not.