Answer:
2. They stress the degree to which coach Wilson is incompetent.
Explanation:
Although from the first sentence, the use of the adverb "outstandingly" helps the reader see how much the team has declined, its main objective in the passage is to show coach Wilson's degree of incompetence.
This was made clearer when another adverb "unquestionably" was linked to the "losing streak" mentioned earlier in the passage. In other words, starting 10 years ago, after a new coach was hired, Sunderland College astoundingly could not win a single championship, which unquestionably indicates the degree to which coach Wilson is incompetent.