Your routing configuration relies on eth0 being a 3com card that requires the 3c59x module.
What line must be added to modules configuration file, to ensure that eth0 always uses this module?

A.
eth0=3c59x

B.
set eth0 3c59x

C.
alias eth0=3c59x

D.
set eth0=3c59x

E.
alias eth0 3c59x

Explanation:
/etc/modules.conf or /etc/modprobe.conf file contains the alias with modules as well as parameter used by program.
Syntax of /etc/modules.conf or /etc/modprobe.conf :
alias aliasname modulename [parameter]
So, alias eth0 3c59x

bash syntax is: alias copy="cp"
csh/tsch syntax is: alias copy "cp"

So, depending on the shell, alias eth0=3c59x could also be correct.