Answer:
C. They give background information about the topic.
Explanation:
Sentences 2, 3, and 4 gives the reader background knowledge about what they're reading.
Thousands of characters or symbols represent whole words or ideas
To find the unit rate, you have to divide the cost ($12) by the amount (9)
12/9= 1.333
Therefore, the unit rate is $1.33
Hope this helps :)
<span>Lu Han (born April 20, 1990), is a Chinese singer and actor who was a former member of the South Korean-Chinese boy band EXO, and its subgroup EXO-M. He is signed to S.M. Entertainment in South Korea and Avex Trax in Japan</span>