Question: "What community does Vinaya govern?"

Context: "Vinaya is the specific moral code for monks and nuns. It includes the Patimokkha, a set of 227 rules for monks in the Theravadin recension. The precise content of the vinayapitaka (scriptures on Vinaya) differs slightly according to different schools, and different schools or subschools set different standards for the degree of adherence to Vinaya. Novice-monks use the ten precepts, which are the basic precepts for monastics."

Answer:
monastics
The question asks what community Vinaya governs. We learn from the context, which consists of a brief definition and explanation of Vinaya, that it is specific to monks and nuns (i.e., monastics).
So the answer is "monastics"..