Question

There is a sentence that is missing in the paragraph below. Look at the paragraph and decide where (option 1,2,3, or 4) the following sentence would best fit. 
Sentence: The discovery helps to explain archeological similarities between the Paleolithic peoples of China, Japan, and the Americas. 
Paragraph: The researchers also uncovered an unexpected genetic link between Native Americans and Japanese people. (1)__ . During the deglaciation period, another group branched out from northern coastal China and travelled to Japan. 
(2) _. "We were surprised to find that this ancestral source also contributed to the Japanese gene pool, especially the indigenous Ainus," says Li. _ (3) _. They shared similarities in how they crafted stemmed projectile points for arrowheads and spears. 
__(4)__. "This suggests that the Pleistocene connection among the Americas, China, and Japan was not confined to culture but also to genetics," says senior author Qing-Peng Kong, an evolutionary geneticist at the Chinese Academy of Sciences.

• A. Option 3
• B. Option 1
• C. Option 4
• D. Option 2

Answer 1

The Correct Option is A

Option 3 is the optimal choice for sentence integration. The preceding sentence details a key finding: the identification of an ancestral source impacting the Japanese gene pool. Furthermore, the following sentence references "archaeological similarities" across Paleolithic populations in China, Japan, and the Americas. Consequently, Option 3 is the correct selection.
Thus, the correct option is (A) : Option 3.