Why do claims need to be supported? Instead, a meaningful argument has to establish its supporting claims, as well, in order to establish validity and sway readers. In academic writing, supporting claims do most of the real work.

because It's very easy to make a bold claim and walk away. But how many people will be convinced by such a claim, all on its own? The heavy lifting of most writing comes in the form of supporting details. Support allows a claim to be verified, proven, and convincing to an audience

Explanation:

cabeza de vaca was an spanish explorer and n his long exploration of 11,000.km. from florida to present-day mexico, he went through a series of calamities and setbacks that only added to his deeds. he applied his religious creed with the humanist idea, always current and universal, that all men were equal before god and destiny without any discrimination. as an explorer, he became a slave to the tipinoga, then his shaman pointer, later and after an operation of heart to an indian (from which both came alive) he achieved stardom and became a hero followed by a crowd that professed unusual respect and admiration.

i think it may be b, i'm not exactly too sure on this. but b seems to make more sense.