A lack of water, pollution.
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The answer on apex is B intetactions between islam and hinduism led to significant changes in mughal society
B.C.: Before Christ
A.D. Anno Domini
CE common era
BCE: before common era
Explanation:
All of these abbreviations are used to denote time all around the world according tot he Gregorian calendar. <u>The terms BC and Ad were commonly used by people as they are divided by the year of the birth of Jesus Christ,</u> before it is counted backwards in BC while after is counted as AD.
T<u>o make this notation less christian the same timeline was used but it was named as Common era and before common era to not make time notation a decidedly Christian affair.</u>
