Final answer:
The optic nerve fibers coming from the retina synapse at the thalamus before entering the primary visual cortex.
Step-by-step explanation:
The optic nerve fibers coming from the retina synapse at the thalamus before entering the primary visual cortex. The majority of the connections of the optic tract are to the thalamus, specifically the lateral geniculate nucleus. In this structure, the information from the optic tract is processed and transmitted to the visual cortex located in the occipital lobe of the brain.
For example, when light enters the eyes, it stimulates the photoreceptor cells in the retina. The signal then travels along the optic nerves to the optic chiasm, where the fibers sort and cross over. From there, the fibers connect to the thalamus, where they synapse before reaching the primary visual cortex in the occipital lobe.
Therefore, the correct answer is A) Thalamus.