(1) Doctors once thought that a very high-protein diet could be harmful to a person's body. (2) However, protein is something every person should include in his or her diet. (3) Researchers have found that consuming high amounts of protein can be good for a person's body. (4) In addition, researchers have found that a high-protein diet can help with liver and kidney functions. (5) Scientists in France did a study on rats. (6) They found the rats that were given high amounts of protein were healthier, weighed less, and showed normal liver and kidney functions.
(7) Adding foods high in protein should be a priority. (8) This can help a person to maintain a healthy weight. (9) Fish is one good example of a food high in protein and low in fat. (10) Chicken and turkey are other great sources of high-protein, low-fat foods. (11) Eggs and beans also have high amounts of protein. (12) Half a cup of beans has as much protein as one ounce of broiled steak! (13) Low-fat varieties of dairy foods like milk, cheese, and yogurt are other great sources of protein. (14) Eating a lot of protein is especially important for children and teens. (15) A lack of protein can slow down their growth. (16) Adding protein is easy for children, teens, and adults to do if they know which foods are good sources. (17) However, it is always best to talk to a doctor before changing one's diet.
1
Read the following sentence.

Protein helps to repair body tissues and to keep muscles firm.

Where does this sentence best fit?
A.
after sentence 11
B.
after sentence 2
C.
after sentence 1
D.
after sentence 12