What are key tasks?

a. Conditions described by a commander in his/her intent for the operation's desired end state.
b. Significant activities described by a commander in his/her intent that the unit must perform as a whole to achieve the desired end state.
c. Activities directed by a commander when articulating the scheme of maneuver for an operation.
d. Significant activities directed by a commander to specific units in his/her intent for achieving the desired end state.