What did the German, named Richard Fiedler, develop that could help remove the enemy from their trenches? PLEASE ANSWER BY 7:50 on 11-29-21

Sole i will mark brainlist to who answer

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.

What does the term “escalation” refer to?