Refer to the exhibit. 

Which certificate file contains the private key used to sign the TFTP configuration file for download authentication with Initial Trust List enabled IP phones? 

Answer options:

A. PUB.pem tomcat-trust trust-cert
B. SUB.pem CallManager-trust trust-cert
C. CAPF.pem CAPF cert
D. TVS.pem TVS cert
E. CallManager.pem CallManager cert

E