I don't know who De Vaca is but by context clues I would infer that he realized that Native Americans where not the savages they where thought to be.
He was killed by the french colonists because a mutiny erupted due to the numerous problems that led to the failure of his last mission. Hope this help. Follow and message me for daily answers and help. Hope this helps and good luck. :)
The answer is C) Difficult.
Aiming at slowing Lord Cornwallis's advance in the South, Morgan gradually retired northward and then turned suddenly to confront the British troops at Cowpens, where he won a brilliant and unexpected victory over a larger force under Colonel Banastre Tarleton.
If a coleader has a tendency to be sharp, short, and sarcastic in his interactions with members "they are probably going to rapidly detect his absence of regard for them and end up closed or defensive".
In the case that you are co-leading a gathering, you and your partner have sufficient chances to demonstrate a social style that will advance trust. On the off chance that you two function harmoniously with an unconstrained give and take, for instance, individuals will feel more confiding and trusting when you are present.