Which of the dollowing is true about charcoal?
a. it is made by mixing carbon and clay. b.it has been a main medium used by japanese artists throughout history. c.charcoal is difficult to work with and expensive. d.there are two forms of charcoal that are popularly used.

I'm dead lol: a professor was traveling by boat. on his way he asked the sailor: “do you know biology, ecology, zoology, geography, physiology? the sailor said no to all his questions. professor: what the hell do you know on earth. you will die of illiteracy. after a while the boat started sinking. the sailor asked the professor, do you know swiminology & escapology from sharkology? the professor said no. sailor: “well, sharkology & crocodilogy will eat your assology, headology & you will dieology because of your mouthology.