As for this question, when you want to thank someone for the help, it all depends on how that someone has helped you and if the manner that you were helped would also come in as a factor.
When there is immediate contact between the helper and the one being helped, the most direct way to thank someone is to vocalize it and say it to that person that gratitude that you wanted to express. Other ways would be to return the favor to that person. Most people prefer them to be of equal or more than the value of the help given at the moment. If there is no such available way, then what others tend to do is to remain in debt for that person. So when the time comes that the person needs help, they can readily assist and offer the help they needed.
Answer:

Douglass advocated equal justice and rights, as well as citizenship, for blacks. He begins his speech by modestly apologizing for being nervous in front of the crowd and recognizes that he has come a long way since his escape from slavery.
The “man” Thoreau refers to in the excerpt that "He must have the most up-to-date news at all times.", option D is correct.
<h3>What is the excerpt, Walden?</h3>
Walden explicates Henry David Thoreau's two-year sabbatical in a self-built cabin by a lake in the woods, where he conveyed what he learnt about isolation, nature, work, thinking, and fulfillment during his break from modern city life.
The “man” Thoreau refers to in the excerpt that "He must have the most up-to-date news at all times."
Thus, the answer is option D.
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Never understood him either sorry