If You Erect a Barrier for Protection Against Some Natural

If you erect a barrier for protection against some natural event,what detrimental effect can follow?

A) You shouldn't try to do so because such barriers typically cost more than the structures they are designed to protect.
B) National laws require that anything that interfaces with natural processes be done by federal agencies.
C) Similar projects by others nearby will make your efforts ineffective.
D) Nature is strong enough to immediately overwhelm your efforts, which are then wasted.
E) It can have detrimental effects on others nearby.