How many years passed between the Treaty of Nanjing of 1842 and the return of Hong Kong to Chinese sovereignty in 1997?

Answer and explanation

Correct answer: D. 155 years

  1. Step 1: Subtract the earlier date from the later one. Step 2. 1997 minus 1842 equals 155. Answer: 155 years. Why not the others: The other totals are off by ten or twenty years.

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