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The word 'Buddha' denotes not just the historical figure, Gautama, it refers to a type of person, one who has achieved enlightenment, just like the term 'king' or 'priest'.

A. The word 'Buddha' denotes not just the historical figure, Gautama, it refers to a type of person, one who has achieved enlightenment, just like the term 'king' or 'priest'
B. Just like 'king' or 'priest', the word 'Buddha' denotes not just the historical figure Gautama, but a type of person, one who has achieved enlightenment
C. The word 'Buddha', similar to the words 'king' or 'priest', denotes not just the historical figure Gautama, but an entire class of people, those who have achieved enlightenment
D. The word Buddha denotes not just the historical figure Gautama, but, like 'king' or 'priest,' refers to a type of person - in this case, one who has achieved enlightenment
E. Like the word 'king' or the word 'priest,' the word 'Buddha' does not just refer to the historical figure Gautama, but rather to a class of persons who have achieved enlightenment

[spoiler]OA: D[/spoiler]

How the word can be compared with the king or priest as mentioned in answer choice D?

Is answer choice E wrong because of the verb 'have' that should be singular?