Answer the following questions based on the statement & the requirement of the question “According to the survey of 3000 adults, old age isn’t as bad as younger people except.” Which of the following, if true, would be a valid criticism of the survey?

A    The survey tried to reach out to various income groups, various geographical areas and to both the genders,

B    These survey findings come at a time when older adults account for record shares of the populations in most countries,

C    The older adults that the surveyors were unable to reach have a lower quality of life, on average, then those they did reach

D    Apart from actual age, failing health, an inability to live independently, difficulty with movement were used as an indicators of old age.