The Vas deferens and the Oviduct are both targets for surgical contraception (Vasectomy and Tubectomy respectively). Analysing the process of reproduction, what common biological event is prevented by blocking both these structures?

A. The production of gametes (sperm and egg).
B. The implantation of the fertilized egg into the uterine wall.
C. The successful meeting and fusion of the male and the female gametes.
D. The release of hormones – testosterone and estrogen.