Which of the following is untrue when it comes to fencing in critical areas?

A.
Critical areas should have fences at least ten feet high to provide the proper level of protection.

B.
The fencing should not sag in any areas and must be taut and securely connected to the posts.

C.
The fencing should not be easily circumvented by pulling up its posts.

D.
The posts should be buried sufficiently deep in the ground and should be secured with concrete to ensure the posts cannot be dug up or tied to vehicles and extracted.

Explanation:
Critical areas should have fences at least eight feet high to provide
the proper level of protection. The fencing should not sag in any areas and must be
taut and securely connected to the posts. The fencing should not be easily
circumvented by pulling up its posts. The posts should be buried sufficiently deep
in the ground and should be secured with concrete to ensure the posts cannot be dug
up or tied to vehicles and extracted.