The question asks about the benefits of a community of practice. We should look for this phrase in the passage.
The last sentence of the passage states: Ultimately, the goal of teacher education is to foster a community of practice, where teachers engage in ongoing professional development, reflection and collaboration.
This sentence explicitly lists ongoing professional development and collaboration as the activities that happen within this community.
Option (C) is a direct paraphrase of this statement.
Option (A) is the opposite of collaboration. Options (B) and (D) are too narrow or incorrect based on the text.