The first alternative is correct (A).
The president has the constitutional power to appoint the judges of the supreme court, but not the power to open the impeachment process. This is a prerogative of Congress, specifically the Senate. It is the president of the Senate who is responsible for initiating a process of impeachment of the federal judges and after opening, a commission will make a report to be voted on by the Senate plenary. If the judgment obtains more than 2/3 of the votes, the judge is dismissed, otherwise the case is closed.