Refer to the exhibit. After a planned configuration change, the iBGP session between two PE routers is failing. Which reason for the BGP session failure is true?
A. Routers are using different cryptographic algorithms to compute the key.
B. The configured encryption schemes used on the routers are invalid.
C. Different passwords are used between PE1 and PE2.
D. Nonmatching authentication key-strings are used on PE1 and PE2.
E. Incompatible TCP authentication methods are used on PE1 and PE2.
