Explanation
Correct answer: B.
Choice B is the best answer. The sentence emphasizes a similarity in how people in Bangkok and Chiang Mai celebrate Songkran, indicating that people in both cities gather to celebrate with water fights.
Why the other choices are wrong
Choice A
Choice A is incorrect. The sentence notes the different locations of the largest water fight in Bangkok and the largest water fight in Chiang Mai; it doesn’t emphasize a similarity in how people in Bangkok and Chiang Mai celebrate Songkran.
Choice C
Choice C is incorrect. The sentence indicates that people in Bangkok and Chiang Mai don’t celebrate Songkran in exactly the same way; it doesn’t emphasize a similarity in how people in the two cities celebrate Songkran.
Choice D
Choice D is incorrect. The sentence explains when people in Thailand celebrate Songkran; it doesn’t emphasize a similarity in how people in Bangkok and Chiang Mai celebrate Songkran.