who fought on the side of the republicans in the spanish civil war?\no anti - communist groups\no fascist…

who fought on the side of the republicans in the spanish civil war?\no anti - communist groups\no fascist rebel troops\no a professional army\no international volunteers
Answer
Answer:
D. international volunteers
Brief Explanation:
During the Spanish - Civil War, international volunteers, known as the International Brigades, fought on the side of the Republicans. Anti - communist groups and fascist rebel troops were on the opposing side. A professional army was not a key group fighting for the Republicans in the way international volunteers were.