Answer: B. They may use words that are unfamiliar now but were common long ago.
An example of a primary source is a diary. The diary allows us to see into the thought process of a certain individual at that given time period. Because language changes over time, it's likely they'll use words that aren't that common or perhaps not even used anymore. The general rule is that the further back you go, the past language is less connected with the present language.
Answer:
Examples and Statistics
Explanation:
The examples being 'they sign up to build a school for a gold star on their resume, but they have no real building skills and take jobs away from local construction workers' and 'they arrive to teach English but instead take selfies with the locals'. The statistics are the resources they've used to write this (ex. Schulten, Rolfe, Michaels, etc.) and the information they've drawn from it.
Answer:no one really cares what you think
Explanation: