Answer:
4) It suggests there is one final point to discuss regarding mucus.
Explanation:
The word "Furthermore" indicates that there is still a point about the mucus that needs to be discussed before the article is finished. This point is probably related to other characteristics of the mucus, besides the impression of unpleasant goo. This point that will still be discussed will be about the beneficial functions of mucus in our organism, in addition to showing its importance for our health.
The Red and Arkansas rivers run generally west to east.
Below is the excerpt that can be found elsewhere:
<span>Now some millmen want to cut all the Calaveras trees into lumber and money. But we have found a better use for them. No doubt these trees would make good lumber after passing through a sawmill, as George Washington after passing through the hands of a French cook would have made good food. But both for Washington and the tree that bears his name higher uses have been found.
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The answer is D.