Every different type of sailing rig can be dangerous in certain circumstances. Which situation would most likely be dangerous?

A
A gaff rig is dangerous in a calm wind and sea.
B
A gaff rig is dangerous in a calm wind and large swell.
C
A square rig, such as a ship rig, is dangerous to jibe.
D
A tall, marconi, sloop rig is dangerous to tack.
E