LF - Latest Finish Time Can Be Defined As

LF - latest finish time can be defined as:

A) equal to the earliest start time for the activity plus the time required to complete the activity
B) the earliest time at which the activity can start given that its precedent activities must be completed first.
C) equal to the earliest start time for the activity plus the time required to complete the activity.
D) equal to the latest finish time minus the time required to complete the activity.