C. by expanding the nine-member court with up to six more judges.
Answer:
a. Seafloor spreading
Explanation:
As the plates move away from each other, new crust is formed at the bottom of the ocean, thus giving us seafloor spreading
Answer:
It was responsible for protecting the rights of plebeians.
Explanation:
Senate especially had important role during the period of Republic. At the beginning only patricians participated in the work of Senate, but it later changed. Plebeians gained political rights after they rebelled against patricians. Plebeians at the beginning had a right to select two tribunes, who could veto certain decisions. Later, that number was changed to ten.