All German philosophers, except for Marx, are idealists. From which of the following can the statements above be most properly inferred?

A

Except for Marx, if someone is an idealist philosopher, then he or she is German.

B

Marx is the only non-German philosopher who is an idealist.

C

If a German is an idealist, then he or she is a philosopher, as long as he or she is not Marx.

D

Marx is not an idealist German philosopher.