The Stamp Act required... O A tax on all printed paper used in the colonies.

O the use of a British postal stamp on all mail.

O the establishment of a postal system.

O a tax on sugar, molasses, and paper

Correct answer is A tax on all printed paper used in the colonies.

Explanation:

First option is the only correct one as it refers to an Act brought on 1765, whose goal was to collect revenues on all documents that were enacted in the colonies.

Second option is bot correct as this wasn't a part of the Act.

Third option is not correct as postal system already exist.

Fourth option is not correct as this refers to Sugar Act from 1764.