You will be given a definition of a task first, then some input of the task.
In this task, you will be presented with a multiple-choice question in Persian, and you should answer the question based on your knowledge. Classify the answers based on options.

پس از چه واقعه اي مردان عهده دار سفال سازي شدند؟ <sep> (A) اختراع خط (B) كشف گل رس (C) اختراع چرخ كوزه گري (D) رواج كشاورزي
Output:
B