Which of the following statements is true? by 2020, more than half the population will be age 65 or older. the proportion of the u. s. population over the age of 65 has dramatically increased over the past 100 years. scientists and doctors are confident that by 2020, preventative treatments will prevent menopause. all of the above.

Scientists and doctors are confident that by 2020, preventative treatment will prevent menopause

Explanation:

The third statement is true because unlike the others, it consists of a group of medical professionals who believe something will happen.  The other statements are stating the this will happen, without supporting any evidence.

changing it is a matter of considerable debate. some people are just lucky. they inherited genes that promote a faster metabolism and can eat more than others without gaining weight.

cancer can take years to develop.

it could be from radiation, or a cancer causing substance or amny others.

theres lung cancer, brain cancer, breast cancer, heart cancer

explanation: