Based on historical perspective, the statement that best describes how Mughal rulers of India treated Sikhism and Sufism is that "Sikhism was seen as a threat to Mughal authority, and Mughal rulers adopted Sufism."
Mughal Empire was initially tolerant to all religious beliefs under Muhammad Akbar.
However, subsequent rulers of the Mughal empire only embraced Sufism but found schism a threat, thereby leading to the execution of the likes of Guru Arjan in 1606.
Hence, in this case, it is concluded that the correct answer is "Sikhism was seen as a threat to Mughal authority, and Mughal rulers adopted Sufism."
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