What were the two parts of the Richard Nixon’s agreement to the 1973 ceasefire?

Which events are correlated but do not necessarily have a causal relationship?

The holocaust of world war ii resulted in a) the nazis effectively used propaganda to gain and hold power in germany. b) ethnic regimes carried out mass devastation. c) deporting all european jews to the island of madagascar. d) the systematic mass slaughter of european jews and and others in nazi concentration camps during world war ii.

Why did mobs of whites attack chinese workers