单选题：根据下列文章,请回答题。New U.S Planfor Disease PreventionUrging Armenia

根据下列文章,请回答题。New U.S Planfor Disease PreventionUrging Armenians to take responsibility fortheir health，Health and Human Services Secretary Tommy Thompson on Tuesdaylaunched a$1 5 million program to try to encourage communities to do more toprevent chronic diseases like heart disease．cancer and diabetes(糖尿病)．
The initiative highlights the costs ofchronic diseases--the leading causes of death in the United States——and outlinesways that people can prevent them．Including better diet and increased exercise．
“In the United States today,7 of 1o deathsand the vast majority of serious illness.disability and health care costs arecaused by chronic diseases，”the Health arrd Human Services department said ina statement．
The causes are often behavioral--smoking，pooreating habits and a lack of exercise．
“i am convinced that preventing disease bypromoting better health is a smart policy choice for our future。”Thompson tolda conference held to launch the initiative．
“Our current health care system is notstructured to deal with the rising costs of treating diseases that are largelypreventable through changes in our lifestyle choices．”
Thompson said heart disease and strokes willcost the country more than$351 billionin 2003．
“These leading causes of death for men andwomen are largely preventable，yet we as a nation are not taking the stepsnecessary for US to lead healthier, longer lives，”he said．
The$1 5 million is designed to go tocommunities to promote prevention，pushing for changes as simple as buildingsidewalks to encourage people to walk more．
Dailyexercise such as walking can prevent and even reverse heart disease and diabetes，andprevent cancer and strokes．
The money will also go to communityorganizations，clinics and nutritionists who are　being encouraged to worktogether to educate people at risk of diabetes about what they　can do toprevent it and encourage more cancer screening．
TheAmerican Cancer Society estimates that half of all cancers can be caught by screening，includingPap tests(巴氏试验)for cervical(子宫颈的)cancer, mammograms (乳房X线照片)for breast cancer,colonoscopies(结肠镜检查)，and prostate(前列腺的) checks．If such cancers were all caughtby early screenin9，the group estimates that the survival rate for cancer wouldrise to 95 percent．Which of the following is NOT true of chronic diseases in the US? A．They account for 70%of all death
B．They are responsible for most of thehealth care cost
C．They often result in unhealthyLifestyle
D．They are largely preventabl