Final answer:
Quadrant 1 of the Eisenhower Matrix includes activities that are both important and urgent, which should be done immediately to prevent negative consequences. Therefore, the correct option is D.
Step-by-step explanation:
The correct answer to what actions are included in Quadrant 1: Important & Urgent (Do) is d) Activities that are both important and urgent. Quadrant 1 is part of the Eisenhower Matrix, a time management tool used to prioritize tasks based on their level of importance and urgency. Tasks that fall under this quadrant are critical for your success and require immediate attention. Examples include crisis management, deadline-driven projects, and emergency situations. The nature of these tasks typically demands that they are 'done' right away to prevent negative consequences.