The major purpose of slave codes was to regulate:
a)participation of staves in sports
b)the languages of the slaves
c)activities and actions of slaves
d)the treatment of slaves by their owners.

The major purpose of slave codes was to regulate the treatment of slave by their owners so the answer would be D.

Explanation:

for the points : )

explanation:

interest groups send representatives to state capitals and to washington, d.c. to put pressure on members of congress and other policymakers. they engage in lobbying, or the organized process of influencing legislation or policy. lobbying can take many forms. interest groups can testify in congressional hearings.