Directions: Rearrange the given sentences in a logical sequence to form a coherent paragraph, then answer the question below.

(A) He found that a high percentage of patients experienced functional loss before age 50.
(B) Recently, medical researchers identified a cellular protein linked to aggressive forms of Parkinson's.
(C) Parkinson’s is a progressive neurological disorder that gradually disrupts movement and motor control.
(D) Prompted by this discovery, Dr. Vance analyzed patient records from 40 major hospitals.
(E) These findings underscore the critical need for early diagnostic tools and targeted interventions.
(F) This ongoing physical decline is compounded by the reality that current medications merely address symptoms.

Which of the following sentences should be the THIRD statement in the correctly arranged sequence?

The correct option is B.

To determine the correct logical sequence of the given sentences, let us analyze their context and connections step-by-step:
1. Sentence (C) acts as the ideal opening statement by introducing the main topic: "Parkinson’s is a progressive neurological disorder that gradually disrupts movement and motor control."
2. Sentence (F) naturally follows (C) because it expands on the progression described in (C), referencing "This ongoing physical decline": "This ongoing physical decline is compounded by the reality that current medications merely address symptoms."
3. Sentence (B) introduces specific recent medical research regarding the disorder: "Recently, medical researchers identified a cellular protein linked to aggressive forms of Parkinson's."
4. Sentence (D) connects directly to (B) via the pointer "this discovery" (referring to the identified protein): "Prompted by this discovery, Dr. Vance analyzed patient records from 40 major hospitals."
5. Sentence (A) follows (D) as it presents the results of Dr. Vance's study (referring to him as "He"): "He found that a high percentage of patients experienced functional loss before age 50."
6. Sentence (E) concludes the paragraph logically by summarizing the clinical significance of these results: "These findings underscore the critical need for early diagnostic tools and targeted interventions."

The complete and coherent sequence of sentences is C – F – B – D – A – E.
Therefore, the statement that should be in the THIRD position is sentence (B).