Answer:
Options (B) and (C)
Step-by-step explanation:
The Convergent plate boundary is one type of tectonic boundary, where one plate strikes with the other. During this type of motion, the denser plate sinks below the lighter plate and results in the formation of a subduction zone. The subducting plate melts at greater depth and eventually mixes up with melt. The magma again slowly rises upward due to the force exerted by the convection current, towards the surface of the earth in the over-riding plate, giving rise to the formation of volcanoes. These are the zones of active tectonics, where deep focus earthquakes are originated.
Thus, the correct answer is options (B) and (C).