Respuesta :
The answer is: Â [A] Â "all of these" .
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Note: Â "ALL" of the the answer choices provided are correct.
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The Mayan calendar was significant for:
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 [B]:  "[held]  the key to deciphering the hieroglyphic tablets found in Palenque."Â
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 [C]:  "[measured] time date back to August of 3114 B.C.E."
{Note: Â "B.C.E." Â means "Before Common Era". Â Same thing as "B.C." (before Christ). Â There has, for quite some time been a "movement" to change "B.C." and "A.D."; to: Â "B.C.E." ("Before Common Era") and "C.E." (Common Era); respectively. Â In practice, both are used. Â Just remember: Â "B.C.E. = B.C." ; and: Â "C.E. = A.D."
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[D]: Â "[included]Â a "long count" calendar based on 5,200 years cycles."
{Note: Â The Mayans developed and used a "calendar round" and a "Long Count".}.
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_______________________________________________
Note: Â "ALL" of the the answer choices provided are correct.
________________________________________________
The Mayan calendar was significant for:
________________________________________________
 [B]:  "[held]  the key to deciphering the hieroglyphic tablets found in Palenque."Â
________________________________________________
 [C]:  "[measured] time date back to August of 3114 B.C.E."
{Note: Â "B.C.E." Â means "Before Common Era". Â Same thing as "B.C." (before Christ). Â There has, for quite some time been a "movement" to change "B.C." and "A.D."; to: Â "B.C.E." ("Before Common Era") and "C.E." (Common Era); respectively. Â In practice, both are used. Â Just remember: Â "B.C.E. = B.C." ; and: Â "C.E. = A.D."
_______________________________________________
[D]: Â "[included]Â a "long count" calendar based on 5,200 years cycles."
{Note: Â The Mayans developed and used a "calendar round" and a "Long Count".}.
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