How do trophoblast cells differentiate into cytotrophoblast and syncytiotrophoblast layers, and what is the significance of this differentiation?

• A. Trophoblast cells differentiate into the embryoblast, forming the embryo.
• B. Trophoblast cells differentiate into endometrial cells, contributing to menstruation.
• C. Trophoblast cells divide and differentiate, with cytotrophoblasts forming the inner cellular layer and syncytiotrophoblasts forming the outer layer for implantation.
• D. Trophoblast cells differentiate into decidual cells, aiding in nutrient absorption.

Answer: (C)