How deep below Earth's surface do rocks melt?

A. 1000 km

B. 500 km

C. 50 km

D. 50 m

I say, it would really be around like 50-500km. Really, it would be 70km.

Explanation:

Magma rises with convective currents, then cools and spreads intent on form ocean-floor crust. The place to start for melting has lengthy been idea to be at 70 kilometers under the seafloor.