Question

consider this claim: people should do yoga if they want to help prevent some of the common ailments associated with aging. which is the strongest evidence to support the claim? yoga instructor maria nolan states, \yoga literally gets your blood flowing. it has been found to get more oxygen to the cells.\ in a survey of senior citizens who had recently begun attending yoga classes, a majority said that they enjoyed and looked forward to the classes. most yoga instructors agree that people of any age can safely practice yoga. research indicates that yoga can improve peoples flexibility, which helps to prevent arthritis and other common joint problems.

Explanation:

The claim is about yoga preventing common ailments of aging. The first option just mentions blood - flow and oxygen to cells without directly linking to aging - related ailments. The second option is about enjoyment of yoga classes, not prevention of ailments. The third option is about safety of yoga at any age, not prevention of aging - related ailments. The fourth option directly links yoga's improvement of flexibility to prevention of arthritis and other common joint problems which are aging - related ailments.

Answer:

Research indicates that yoga can improve people's flexibility, which helps to prevent arthritis and other common joint problems.