When you add fractions does the denominator change

What is the difference between the kurds and the shia muslims? a the kurds are a religious group while the shia muslims are an ethnic group. b the kurds and the shia muslims are religious groups. c the kurds are an ethnic group and the shia muslims are a religious group. d the kurds and the shia muslims are ethnic groups.

Which of the following is considered a push factory a.available jobs b. unfair treatment c. religious freedom d.affordable land

How has congress added to the president’s role as chief economic planner over the years?