Either A, B, or C

Here's a specimen of bad English if I've ever seen one:

Greek and many other languages have grammatical gender: a noun is either masculine, feminine, or neuter (and must have its article and adjective in agreement with that gender), sometimes quite regardless of its sex or lack thereof.

It was found in a Greek textbook shortly after a glowing endorsement of the study of grammar toward speaking and writing 'correctly, clearly, elegantly.'

Indeed.