According to Jeff's response to Justin, we can see that Justin is following the maxim of quantity which is when someone tries to be as informative about something without giving irrelevant details.
Justin informs Jeff that he just got the job he has been after and after congratulating him, Justin goes ahead to let him know that he resumes work immediately and then tells him he will see him later.
Here, Justin gives out information that is relevant to what they are discussing and does not stay back for chit chat which would bring about irrelevant talk.
The detail in the passage that supports the idea that economic life was difficult in China is the following one:
As a result of wars, famine, and political oppression, Chinese immigration to the United States dates back to the mid-1800s.
Chinese immigrants came to the United States looking for better economic opportunities so they could provide for their families and send money to their relatives back home.
"A" is probably the best choice. All of your other choices are close-ended questions, and can only be answered with a simple yes or no, But "A" is an open-ended question because the answer wont be just a "yes" or "no".
Animation is a method in which figures are manipulated to appear as moving images. In traditional animation, images are drawn or painted by hand on transparent celluloid sheets to be photographed and exhibited on film. Today, most animations are made with computer-generated imagery (CGI).
