Wow, this question is as clear as mud. Maybe the exam writers were drinking too much coffee when they came up with this one. I'm just going to blindly guess and hope for the best.
This is easy! The update is for a prefix inside the same AS, so the AS Path will be the same, and the local-preference will be set to the default value of 100. C is the correct answer, no doubt about it.
Okay, let's think this through. The AS Path tells me where the update came from, and the local-preference determines how the route is prioritized within the AS. I'll go with A, since that seems to match the information in the question.
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