What type of source is this? Social Changes Through the Ages
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If two person had given your answer then there is a option of mark as brainliest. click there in the option of mark as brainliest in which you like the answer most. if any one person has given answer then after some days you will a notification to mark his/her answer as brainliest.

It's a, if this is wrong, i'm so sorry, i'm just trying to