Which of the following is the likely cause?

A system administrator inherits a Linux system with a 2.2 kernel. After upgrading to a 2.4 kernel, the ipchains commands no longer function. Which of the following is the likely cause?

A.
The 2.4 kernel does not support ipchains

B.
The new kernel was not compiled with ipchains support

C.
The old ipchains module needs to be loaded

D.
The ipchains package needs to be upgraded