Based on "the think tank," which can be inferred from the fact that the article says that shumaker is "delighted" when azy makes a mistake? a. shumaker thinks that azy only makes mistakes when the question being asked is unfair. b. azy can tell when shumaker is bored, and he occasionally makes mistakes to improve shumaker's mood. c. shumaker wants to understand how azy thinks just as much as he wants to teach azy. d. azy's mistakes are often signs that he is trying to be playful with shumaker and make a joke.

invention of the washing machine

in the past, people used sticks and stones or scrub boards to clean their clothing. as it was sweaty, backbreaking work, we owe a world of to james king because he created the model for the modern washing machine in 1851. the most important issue was that this machine cleaned clothes while a person cranked the handle. doing this made people who used it develop strong muscles in their arms. later, in 1908, alva j. fisher created an electric washing machine named thor. this one was not the first automatic washing machine. however, it was one of the most popular models at the time.