Correct answer choice is :
A) Amber has allowed scientists to study DNA that has been preserved over millions of years.
Step-by-step explanation:
Michio Kaku is an American theoretical physicist, futurist, and popularizer of science. He is a teacher of theoretical physics in the City College of New York and CUNY Graduate Center. His proclaimed goal was to create a beam of gamma rays powerful enough to produce antimatter. Kaku was inducted into the United States Army during the Vietnam War.