Buying a house is most likely a long-term goal for a person of which of these ages?
A. 57 years old
B. 67 years old
C. 77 years old
O D. 17 years old

How did alexander fleming’s research solve a societal problem? he developed ways to treat inherited diseases. he advocated for regular hand washing to kill germs. he discovered a new type of medicine that could treat infections. he discovered the cause of mad cow disease, an emerging disease.