The Following Questions Refer to the Excerpt Below

The following questions refer to the excerpt below.
"It is a heavily populated land. We asked why they did not sow maize;they replied that they were not doing so in order not to lose the crop,for during two consecutive years the rains had failed and the weather had been so dry that all had lost their whole crop of maize,and they did not dare sow it again until there had been copious rain. And they begged us to tell the heavens to rain,and implore them to do so,and we promised that we would do this. We also asked them from where they had brought [the maize they had],and they said from the direction the sun had set,and in all that land there was maize everywhere."
-Which of the following contributed most to the issues de Vaca describes in the passage?

A) The development of labor systems such as the encomienda system
B) Increasingly clear cultural understandings as languages were translated
C) Increasing contact between Native Americans and Europeans during the 16^th century
D) Cultural misunderstandings between Native Americans and Europeans during the age of encounter