Answer:
Congress may threaten to defund the SEC and may also dissolve the agency.
Explanation:
The congress has the power to interfere in the rules adopted by an agency if there is a possibility that these rules could harm the market at local or national level. This interference has even greater power if the agency receives funding and is actively dependent on the state's permission to remain established, as is the case with the SEC.
In the question above, we can see that the SEC has adopted rules that displease Congress, so that Congress can persuade the SEC to adopt these rules, it may threaten to defund the SEC and may also dissolve the agency.