Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'protein localization to presynapse'?

A. A process in which a protein is transported to, or maintained in, a location within a presynapse.
B. A process in which a protein is transported to, or maintained in, a location within a presynaptic membrane.
C. Any process in which a protein is transported to, and/or maintained at the postsynapse, the part of a synapse that is part of the post-synaptic cell.
D. The clustering process in which gephyrin molecules are localized to distinct domains in the postsynaptic density as part of postsynaptic density assembly. Gephyrin is a component of the postsynaptic protein network of inhibitory synapses.

Answer: A process in which a protein is transported to, or maintained in, a location within a presynapse.