What is the structure of the following sentence?

while you were on vacation, i watered the plants

You are working with a volunteer organization improving and repairing houses in an older part of town. your group’s goal is to repair a house today, but your group’s leader is sick at home. an effective group member would do all of the following except? a. discuss and assign roles b. identify and analyze the problem c. organize a list of projects d. follow through on their assigned duty