If any term in the first column of a Routh array becomes zero, then

• A. Routh criterion cannot be used to determine stability
• B. Routh criterion can be used by substituting a small positive number for zero and completing the array
• C. Routh criterion can be used by substituting a big positive number for zero and completing the array
• D. Routh criterion can be used by substituting a small negative number for zero and complet-ing the array