PLEASE HELP ASAP Why did the public's opinion change about the use of DDT?

a. Several plants and animals were added to the endangered species list.

b. A biologist published a book that opened the public's eyes to DDT's harmful effects.

c. The public started to see the effects of DDT—their pets and children were getting sick.

d. A sitting president convinced the public that DDT was a dangerous carcinogen.

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.

that’s a nice boss :