Respuesta :
Answer:
A. Washington was a general before becoming president, and Jackson was also a general.
E. After his voyage in 1492, Columbus and his men arrived in what they believed to be Southeast Asia.
Explanation:
B is wrong because the comma before 'and emperors' is unnecessary.
C is wrong because commas should not be used before a list. Colons (:) are to be used.
D is wrong because there are no commas.

The sentences that correctly use commas is :
A. Washington was a general before becoming president, and Jackson was also a general.
E. After his voyage in 1492, Columbus and his men arrived in what they believed to be Southeast Asia.
The Use of Commas
A comma is a punctuation mark, used particularly as a check of division inside the sentence.
The uses of comma are :
It utilize a comma to partitioned free clauses.
It uses a comma after an early on clause or state.
It uses a comma between all things in a arrangement.
It uses a commas to set off nonrestrictive clauses.
It uses a comma to set off appositives.
It uses a comma to demonstrate coordinate address.
It uses a commas to set off coordinate citations.
Thus, the correct options are A and E.
Learn more about "Comma":
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