Concept:In a presidential system, certain major actions require legislative approval, but routine public service appointments are executive in nature.
Explanation:Appointment of Supreme Court judges is usually subject to legislative confirmation.
Rectification of treaties also requires ratification by the legislature.
Civil servants, however, are recruited through the Civil Service Commission or normal executive procedures.
These administrative appointments do not require legislative screening or confirmation.
Therefore, legislative approval is not necessary for the appointment of civil servants.
Answer:D. Appointments of civil servants.