Who was Hedy Lamarr? Who was Mary Anderson? What did they invent that contributes to modern times?

Hollywood actress Hedy Lamarr, “the Angelina Jolie of her day,” was also an avid inventor and the person behind advances in communication technology in the 1940s that led to today's Wi-Fi, GPS, and Bluetooth.

Alabama native Mary Anderson (1866-1953) is credited with inventing the first operational windshield wiper. In her 1903 patent, she called her invention a window cleaning device for electric cars and other vehicles. ... Anderson left home in 1893 at age 27 to operate a cattle ranch and vineyard in Fresno, California.

i do believe its (d) it allowed the government to offer pioneers sixty acres of western land if they lived on it and made improvements to it.

explanation: signed into law in may 1862, the homestead act opened up settlement in the western united states, allowing any american, including freed slaves, to put in a claim for up to 160 free acres of federal land. by the end of the civil war, 15,000 homestead claims had been established, and more followed in the postwar years