In the following questions, a grammatically correct and meaningful sentence is given which is divided into four parts namely (A) ,(B) ,(C) and (D) You have to arrange the four parts to make a contextually and grammatically meaningful sentence. If no such rearrangement is possible mark (e) as your answer i.e. 'No rearrangement required'.

an epidemic that does (A) / not discriminate based (B) / obesity has been declared (C) / on age, gender, or ethnicity (D)

The correct order of the sentence parts is CABD.

Let's analyze the given parts to reconstruct a grammatically complete and contextually coherent sentence step-by-step:
(A) an epidemic that does
(B) not discriminate based
(C) obesity has been declared
(D) on age, gender, or ethnicity

Step 1: Identify the main subject of the sentence.
Part (C) "obesity has been declared" starts with the noun phrase "obesity", which functions as the subject of the sentence followed by the verb phrase "has been declared". Thus, (C) is the logical opening part of the sentence.

Step 2: Connect the predicate noun phrase.
What has obesity been declared? Part (A) "an epidemic that does" logically completes part (C) ("obesity has been declared an epidemic that does..."). So, part (A) follows part (C).

Step 3: Link the relative clause.
Part (A) ends with the auxiliary verb "does", which naturally pairs with part (B) "not discriminate based" to form the negative verb structure "does not discriminate based". Thus, part (B) follows part (A).

Step 4: Add the prepositional complement.
The phrase "discriminate based" in part (B) requires the preposition "on", which is provided at the beginning of part (D) ("on age, gender, or ethnicity"). Thus, part (D) follows part (B).

Putting it all together, we get the complete meaningful sentence:
"Obesity has been declared an epidemic that does not discriminate based on age, gender, or ethnicity."

Therefore, the correct sequence is CABD.