Answer:
Prohibiting slavery in the territories.
Explanation:
According to the ruling it was decided that Congress had exceeded their authority when ratifying the Missouri Compromise, and therefore "had no power to forbid or abolish slavery in the territories west of Missouri and north of latitude 36°30" (Britannica.com).
The answer is C
C. Judges cannot be removed from office; elected officials can be removed from office.
The judges have more independence and autonomy in their work, so much so they cannot be removed from office at least they go against the constitution, on the contrary, elected officials can be removed, investigated or penalized from office by the attorney general's office if they commit grave offenses.