Which situation would most likely increase the carrying capacity for humans in a certain region

B

Explanation:

The carrying capacity of an environment is the max number of organisms that it can sustain and support. All of the other options would reduce the carrying capacity or reduce the number of people. A new source of water would help support more people (because people need water).

from the word list given, the most suitable words that relate to the reason information were written would be:  

objectivity: lack of bias, judgment, or prejudice

accuracy: free of mistakes, to be correct

authority: the ability to tell people what to do or believe in

content: to be satisfied  

it can be said that the author made the article to present objectivity, to provide accurate information, to be the authority in the subject that he or she writes, and to be satisfied of the information quality given out.