In the context of ancient Rome, assemblies had specific powers. The correct answer to the question about the powers of the assemblies would be:
d. to make laws and elect officials.
Assemblies in ancient Rome, such as the Comitia Centuriata and the Comitia Tributa, had the power to pass laws and elect magistrates. While assemblies had some influence on issues like foreign policy and financial matters, their primary functions revolved around legislation and election.