@David, Moderator posted:
Hi, deepcosmos—Yes, both (A) and (B) are good alternatives. Though it can be a little awkward to use "An X is Ys" or "Xs are a Y" structures, where a plural is identified with a singular or a singular with a plural, they are acceptable.
Hi, David, how could I thank you enough? Gustavo has almost saved me from another headache with a conditional sentence. With my sincere RESPECTs to all of you in G/Exchange~!!