Which of the following was NOT a use for "rock oil" (oil from the ground) before the invention of the automobile?
a. It was used in lamps to light people's homes
b. It was used in medicines
c. It was used as a lubricant for wagons and tools
d .It was used as a cooking oil

frederick william of brandenburg-prussia trained his son, frederick, to be a hardy soldier. but frederick disliked rifle shooting and horseback riding. unlike his father, he was interested in french literature. he enjoyed poetry and music and, like some others of the enlightenment, he scoffed at religion. his father thought him soft, frivolous and unmindful of his duties. and when frederick refused to put his signature on a right to succession, for a few moments his father strangled him.