Problem: Does "They conclude that Edison's version was able to outstrip the others because of a combination of three factors: an effective incandescent material, a higher vacuum than others were able to achieve (by use of the Sprengel pump) and a high resistance that made power distribution from a centralized source economically viable." answer the question "What made power distribution economically viable in Edison's lamp?"

A: yes

Problem: Does "Hitler had been convinced by Raeder that this was the right course of action due to the high success rates of the U-Boat force during this period of the war." answer the question "What ultimately convinced Hitler that Raeder was right?"

A: yes

Problem: Does "The employment associated with the highest risk of problems include: those who spray paint, bakers and those who process food, nurses, chemical workers, those who work with animals, welders, hairdressers and timber workers." answer the question "What professions normally have the highest risk of problems?"

A:
yes