1.

A. Some of the worst cancers aren't detected by screening. B. The only way to be sure is to look at the results of randomized trials comparing cancer deaths in screened and unscreened people. C. So how can we be confident that getting a screening test regularly is good idea ? D. Even when screening "works" in such trials, the size of the benefit observed is surprisingly low: Generally, regularscreening reduces fatalities from various cancers between 15 percent and 25 percent. E.They appear suddenly, between regular screenings, and are difficultto treat because they are so aggressive.

Answer»

DBAEC
AECBD
ADBEC
ACBED

Answer :B


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