If the sentence in question is a statement (ends with a period), I would probably "however" as your transition word.
Answer:
A (that the author holds a very high opinion of Thurgood marshall)
Explanation:
The answer is A (that the author holds a very high opinion of Thurgood marshall)
Looking at the world champion according to the above excerpt it means high opinion and esteem. The author uses the word champion so that the people can think of Thurgood Marshall as a man of high esteem which makes the author sentimental in his view. We can also see that throughout the excerpt the author praised Thurgood Marshall until the last sentence.
Answer:
I am writing to let you know what I am doing this week. I just got back from the Cheese Rolling Race in Gloucestershire, England. It was a strange experience but fun!
Explanation:
Sorry but I am not sure about the last question.