According to an American Cancer Society's annual report published in December 2009, the U. S. cancer death rate continues to decline, as it has since the 1990s. This may be attributed to all BUT ONE of these factors.

0)

A)

early screening

B)

fewer people smoke

C)

genetic engineering

D)

healthier diet and less obesity

C

Explanation:

The reduced rate of cancer deaths in the United States may be attributed to all of the factors except genetic engineering. Early detection and a healthier lifestyle are the main contributors to the reduced incidence of cancer as well as the reduce death rate.

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.