The primary obligation of the lawyer is to ______.

A) see that justice is done
B) see that the Constitution is always respected
C) try to work out a solution that is fair to all parties involved
D) vigorously serve the client's interest within the legal and ethical rules

While all of the options may be important to a lawyer, their primary obligation is to represent their client's interests within the legal and ethical rules. This means advocating for their client to the best of their ability, but also ensuring that they do not violate any laws or ethical guidelines in the process. Ultimately, the lawyer's job is to serve their client's interests to the best of their ability.