In an argumentative essay, where should the writer’s claim first be stated? in a thesis statement in the introduction
in the first sentence of the first body paragraph
in the first sentence of the second body paragraph
in the summary in the conclusion

In a thesis statement in the introduction.

Explanation:

When writing a argumentative essay the claim should be first stated in the thesis statement . Because the boys paragraphs help support the claim then you have to restate the claim in the summary in the conclusion.

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain