Which of the Following Is an Example of the Micro

Which of the following is an example of the micro level affecting the macro level?

A) Corporations layoff workers to move operations to other countries to take advantage of tax policies and/or avoid environmental and worker protection laws.The unemployed workers postpone marriage or having children until they get another good job.
B) The state changes marriage laws to allow gay people to marry.
C) Parents unable to get affordable health insurance send letters with pictures of their ill children to representatives in Washington DC to ask for a public option for health coverage.
D) The U.S.declare war and sends thousands of troops overseas,causing many soldiers to speed up marriage plans before they are shipped out.