Answer: Elle vient du Viêtnam
Explanation: The question in French is requesting where Marie is from. Marie is female so we will use the feminine pronoun "elle" when describing her. To describe being from somewhere we will use the French conjugated verb "vient" which loosely translates in English to "come" or to "be". She is from Vietnam so we will use the particle "du" to connect our sentence and use the French word "Viêtnam" to finish our sentence.