• A. be costly
• B. harmful
• C. save a life
• D. still open to debate
• E. reduce the risk of radiation triggering a cancer
• F. reduced to the minimum

Advantages of screening women under 50 are

A．Water on Titan exists in the form of ice.
B．There are life clues there.
C．Rivers and lakes there contain life forms.
D．There is acetylene ther