Marie and Pierre noticed burns on their fingers after handling test tubes containing radioactive substances. This observation led to

Question

A. the discovery of natural fluorescence.
B. the discovery of X-rays.
C. the discovery of radiation therapy.
D. the discovery of uranium.
Is the answer B? Thanks in advance

Answer 1

I would choose C

Answer 2

Line JK bisects line LM at point J. Find JM if LJ=23 cm