Answer: C. Mainly volcanic mountains
Ocean-ocean convergence is a process that takes place in deeper oceanic plates, which are lying deeper in the oceans. When these plates converges it results in subduction which means deposition of materials when the edges of the two plates convergence the sediments are deposited beneath the ocean. These heavy sediments affects the magma and generates energy sufficient to cause volcanic eruptions. The volcanic eruptions results in the formation of mountains as above the magma there are many layers of sediments which develop into mountain.
