Which process would most likely result in the formation of a volcano?

A central crack forms where a thin section of the earth’s crust breaks, and molten rock seeps out.
A central crack forms where a thin section of the earth’s crust breaks, and molten rock seeps out.

The earth's crust is broken into pieces.
The earth's crust is broken into pieces.

A central crack forms where a thick section of the earth’s inner core breaks, and molten rock seeps out.
A central crack forms where a thick section of the earth’s inner core breaks, and molten rock seeps out.

Heat and pressure act on igneous or sedimentary rock.