Proficient is the correct answer. At the proficient level of mastering a skill, decision making is still analytical, but you’re becoming more comfortable relying on a gut feeling, rather than a rule. The other responses are incorrect.
At the advanced beginner stage, you are only just beginning to understand the context of the rules; this isn’t the best stage to try tailoring the processes or change the agile rules. In the competent stage, you are still deciding
which rules are best for the situation. Finally, in the expert stage, you are confidently making intuitive and spontaneous decisions.