@previous (B)
"Forae" is the plural. I am addressing the singular fora. Thanks.
@previous (A)
Ah, forgive me. I thought that you had multae-posted (pronounced as one word) this post.
@previous (C)
"Forums" is only correct if one tries to apply the grammatical rules of Ancient Greek, a dead language, to English, a completely different, and living, language. Ergo, it is incorrect. Thanks.
@previous (A)
Forum. Plural is "forums".