CKC Just Received Permission from the IRS to Change Its

CKC just received permission from the IRS to change its method of accounting. CKC is uncertain if it now wants to change methods. Since it already has received permission to change,

A) CKC must use the new method of accounting
B) CKC may continue to use its current method of accounting only if it makes a timely election
C) CKC may continue to use its current method of accounting only if it makes a timely election and subsequently receives IRS permission
D) CKC may continue to use its current method of accounting even if it does not make a timely election