Given the task definition and input, reply with output. You are given a statement written in Bengali. Choose the most logical word from the given 4 options which can be used to replace the <MASK> token in the statement . Output the word from the correct option .

Statement: c. 3,700 BCE Cuneiform writing appears in <MASK>, and records begin to be kept. According to the majority of specialists, the first Mesopotamian writing was a tool that had little connection to the spoken language.

Option A: Iraq

Option B: Serbia

Option C:

Option D: Sumer
Sumer