Which of the Following Is an Example of a Push

Which of the following is an example of a push factor in immigration?

A) Ethnic cleansing of people of your ethnic group in the nation you are leaving
B) Ethnic cleansing of people in your ethnic group in the nation you are seeking to enter
C) Policies that allow people with your particular skill set to easily find well-paying work in the nation you are entering
D) The presence of family members who already live in the nation you want to move to