Question

My great-grandfather immigrated to America from Kazakhstan. My great-uncle immigrated from Kazakhstan, too. Which combines the sentences using a correlative conjunction? Both my great-grandfather and my great-uncle immigrated to America from Kazakhstan. My great-grandfather and my great-uncle immigrated to America from Kazakhstan. My great-grandfather immigrated to America from Kazakhstan, but my great-uncle also immigrated from Kazakhstan. My great-grandfather immigrated to America from Kazakhstan, and my great-uncle immigrated from Kazakhstan, too.

Answer 1

Correlative conjunctions are pairs and they work together.

Therefore, sentence A would be the best answer. The correlative conjunctions are "both" and "and". 

Answer 2

The answer would be the first sentence given,
Both my great-grandfather and my great-uncle immigrated to America from Kazakhstan.