Which statement concerning the navigation of a vessel in ice is FALSE?

A
Anchoring in the presence of ice is not recommended except in an emergency.
B
Towing a vessel through an ice field is not recommended except in an emergency.
C
The "Free and Proceed" system of escorting a beset vessel cuts down on the number of freeing operations.
D
When anchoring in ice, it is advisable to increase the scope of the chain over what is normally used for non-icing conditions.
E