During the stage the embryo begins to form the various tissues and organs that make a human. A. Germinal
B. Embryonic
C. Fertilization
D. Fetal

embryonic

Explanation:

The embryonic stage plays an important role in the development of the brain. Approximately four weeks after conception, the neural tube forms. This tube will later develop into the central nervous system including the spinal cord and brain. The neural tube begins to form along with an area known as the neural plate.