Answer:
3. testify in court on behalf of immigrants
Special interest groups, for example, immigrants themselves, have the right, in a pluralistic society, to testify on behalf of immigrants.
4. get a Senator to introduce legislation to ensure healthcare for Hispanic children
As long as the special interest group uses arguments, and not money, it has the right to try to convince a senator to induce particular legislation.
5. meet with Congressional leaders to ask for the protection of religious minorities
This situation is similar to the one above. Special interest groups can meet with Congress people and try to convince them of certain acts or legislation, like for example, protecting religious minorities.
The answer is A, checks and balances system. The power of courts determines what the government does, in accords with what the Constitution provides.
