The passage suggests which of the following about service workers in the United States?

In comparing the United States government's definition of services with the classical definition, the author suggests that the classical definition is

The author of the passage is primarily concerned with

The primary purpose of the third paragraph is to

It can be inferred from the passage that which of the following is a true statement about sea snakes?

The author describes the behavior of the circulatory system of sea snakes when they are removed from the ocean (see in the highlighted text) primarily in order to

It can be inferred from the passage that which of the following is true of species of terrestrial snakes that often need to assume a vertical posture?

According to the passage, many African American people joined the armed forces during the First World War for which of the following reasons?

It can be inferred from the passage that the "scholars" mentioned in the highlighted text believe which of the following to be true?

The passage suggests that many African American people responded to their experiences in the armed forces in which of the following ways?