Vitamin B-Complex is one of the vitamins that help our body to function properly. It has all the essential nutrients that helps convert food into nutrients in order to fuel and energized our body. Vitamin B-Complex is water-soluble, it means that it can be easily dissolved in water.
So the answer is : Complex.
You can take in more air and be under water longer
Pretty sure it’s studies because you read textbooks to learn more about the subject. So B.Studies
