Why is Martin Luther King's day is in Jan, 3rd Monday?

Which of the following was a similarity between classical mesoamerican and south american civilizations ?

Which of the following shows the correct order of events? catt’s “winning plan,” suffrage in some western states, the nineteenth amendment suffrage in some western states, the nineteenth amendment, catt’s “winning plan” suffrage in some western states, catt’s “winning plan,” the nineteenth amendment catt’s “winning plan,” the nineteenth amendment, suffrage in some western states

The mongols were descendants of a. pastoral nomadic tribes b. tibetan tribes c. shang nobility