An Experienced Driver Can Drive While Holding a Relatively Complex

An experienced driver can drive while holding a relatively complex conversation. This combination of activities is difficult, however, for a novice driver. Which of the following explanations is MOST likely to explain the difference?

A) The two activities are very different, so the task combination creates no problems with channel segregation.
B) Practicing a task leads to a decline in the resource demands for that task.
C) The two activities are very different, so they rely on different sets of task-specific resources.
D) Practicing the tasks improves confidence in the task.