Why was marie curies research dangerous

Marie Curie, known as the 'mother of modern physics', died from aplastic anaemia, a rare condition linked to high levels of exposure to her famed discoveries, the radioactive elements polonium and radium. ... Her body is also radioactive and was therefore placed in a coffin lined with nearly an inch of lead.

Explanation:

b is the best answer for this question.

a time line cause it goes from 685 to 978