It was a hard tie between C and E.
I will go with E. It seems like C is out of scope.

E it should be.
B negates the reasoning.
A seems out of scope.
D doesn't deliver a good reason.
C can be the answer but E sounds better.

I narrowed it down to D 'coz of this statement in the passage :
" However, the very fact that such reproof occurs and is generally accepted implies that our Western societies basically respect the elderly "

BTW the name is Gaurav

Yes, (E) has to be it. All other answer choices are out of scope.

Paraphrasing the passage:
An unbiased person doesnot find too many instances of unkindness towards old people.
Such cases are known to happen, but people are aware of them and rebuke them. This proves that people do have more respect towards the elderly.
A survey also proves that the younger generation are more sensitive towards this issue of disrespect towards elderly and the elders tend to agree with this.

(A) people under 65 are just as kind to people over 65 as they are to people of their own age group --> nothing in the passage suggests this

B) survey data suggest that fewer people over 65 than under 65 get too little respect--> issue is about respect for people over 65, nothing about respect for other age groups is mentioned

(C) disrespect for the elderly does not go so far as to result in actual harm--> again this is a "feel good" question and not relevant

(D) survey data suggest that people over 65 are more aware of incidents involving disrespect to the elderly than are people under 65--> there is no proof of this, as a matter of fact the passage mentions "71 percent of the under 65 population agreed with the statement "

(E) incidents of unkindness to the elderly are neither common nor generally accepted in Western societies--> "neither common" is correct from the first sentence of the passage "may not find many instances of kindness" and "nor generally accepted" is mentioned as "very fact that such reproof occurs and is generally accepted".