They change our culture by causing people to become addicted to phones and other thing as well as causing us to be able to communicate/talk with other people helping 911 responders to get places quicker
D. Several factors led to the beginning of World War I.
The topic sentence from the passage shows us that it follows a cause and effect pattern. It sets the reader up to understand that the rest of the passage will be about several factors that caused World War I. The rest of the options are the different factors that led to World War I. They do not use key words that would indicate a cause and effect patterns like the words "Several" and "led" do in the first sentence.
I believe the answer is C
