Marie Curie, a brilliant scientist, was born in Warsaw, Poland, on November 7, 1867. She moved to Paris in 1891 to study at the Sorbonne. In 1895, she married Pierre Curie, and together they conducted groundbreaking research. Their most famous discovery, radium, was made in 1898. Marie Curie won her first Nobel Prize in Physics in 1903 and a second Nobel Prize in Chemistry in 1911. She passed away on July 4, 1934. According to the text, when did Marie Curie discover radium?
A) 1867