The answer I believe would be b
The discovery of radioactivity closely followed the discovery of X-Rays. The X-Ray was accidentally invented by Wilhelm Conrad Röntgen in 1895. With the help of his wife, Röntgen tested his wife's hand and captured the bones in her hand and her wedding ring. It became the first röntgenogram and garnered attention from the public and the scientific community.
A rumor that rifle cartilages were greased with cow fat and pig fat.
The <span>Grand Coulee Dam was the first major project of the New Deal-era energy production drive in Washington. :D
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