The ribbon has exactly the same tabs, buttons, and features in every Microsoft Office program

A security administrator must implement a system to ensure that invalid certificates are not used by a custom developed application. The system must be able to check the validity of certificates even when internet access is unavailable.Which of the following MUST be implemented to support this requirement?

A. CSR B. OCSP C. CRL D. SSH

____ is the most popular spreadsheet program?.

Fill in the blank(s) with the appropriate word(s).