Final answer:
The zygomatic bone, or cheekbone, forms the lower and outer edges of the eye socket (orbit) and connects with the maxilla at the front, also partaking in the formation of the zygomatic arch. So, the correct answer is A.
Step-by-step explanation:
The facial bone that forms the lower and outer edges of the orbit and joins the maxilla at its anterior edge is the zygomatic bone, also known as the cheekbone. The zygomatic bone contributes to the lateral wall of the orbit and the lateral-inferior margins of the anterior orbital opening. Furthermore, its short temporal process projects posteriorly, forming the anterior portion of the zygomatic arch, which spans from the cheek to just above the ear canal and is part of the bridge that separates the brain case from the upper and lower jaws.