Below are the choices for the above question, and the answer is letter A.
A) It made additional food sources available.
B) It allowed for smaller body size.
C) It was the first stage in the development of a bony skull.
<span>D) It increased the surface area for respiration and feeding</span>
The executive branch carries out and enforces laws. It includes the president, vice president, the Cabinet, executive departments, independent agencies, and other boards, commissions, and committees. American citizens have the right to vote for the president and vice president through free, confidential ballots.
U.S. Labor union did not allow Chinese immigrants to become members.
<u>Explanation:</u>
Labor unions in the United States are organizations that are formed by workers from various industries that are recognized under "<u>US labor law</u>". Labor union opposed immigrants because they thought that the American workers will be undermined.
In the 1850’s, Chinese immigrants established Chinatowns in cities mainly on the western coast of the United States as U.S. Labor union did not allow Chinese immigrants to become members. In 1882, American government passed “Chinese Exclusion Act” to stop Chinese immigrants from becoming American citizens.