Yes, it's ambiguous without any context. Je viens de France could mean "I'm from France" as in I'm a French person, or it could mean "I'm coming from France" as in having come from France to another place like Italy.
Both answers should be accepted and this question needs to be fixed
You've probably figured it out by now, but the singular would be "cette fille" and the plural would be "ces filles". You will be able to tell the difference between those by the "t" ending in "cette". Now that you have determined it is plural, you know it must be viennent. Bon courage!