What event triggered american sanctions against the soviet union in 1979

martin luther king (1929-1968) was an activist for the african american rights, mr. king has a profile of a kind leader that built a tenacity, respect and full of hope future. he was an activist through civil disobedience and no violence pressure mechanisms. he tried to build a more egalitarian and fair society. his efforts carried a reivindication message of the civilian rights to every west corners. for that reason, he won the nobel prize in 1964.

c. troops marched forward in close formation against newer, more accurate weapons

food chain i would say only because there is competition on getting food and survival