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Read the paragraph below and answer the questions that follow by selecting the letter of the correct response.
When Lewis and Clark made their way through what is now North Dakota, the Shoshone Indian woman named Sacajawea joined the team of explorers. Because the expedition was traveling with a Native American, other tribes did not attack the group. In fact, one tribe even supplied horses to help the explorers and their interpreter cross the Rocky Mountains. This invaluable team member taught the men how to find medicine and food in the wilderness and once even saved the records of the journey when a canoe overturned during a storm. She reached the Pacific Ocean with Lewis and Clark in 1805. Her fame eventually spread; one of the best-known monuments to her is a statue in Portland, Oregon.
Which of the following is a pronoun used to refer to the subject of the paragraph?
Immune Systems
The body's defense mechanism against pathogens, consisting of a complex network of cells, tissues, and organs that work together to protect the body.
NK Cells
Natural Killer cells, a type of lymphocyte critical to the innate immune system, known for their ability to target and destroy tumor cells and cells infected with viruses.
Optimistic
Having a positive attitude and outlook on the future, expecting the best possible outcome in any given situation.
High Blood Sugar
A condition where there is an excessive amount of glucose circulating in the blood, often associated with diabetes.
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