(Needed STAT!!!)Based upon the mechanics of mantle convection, which feature will most likely be formed at the blue arrow, and through which mechanism?
AAn island arc will be formed by ridge push.
b.A rift valley will be formed by subduction.
CAn ocean trench will be formed by slab pull.
DA mid-ocean ridge will be formed by ridge push.
AAn island arc will be formed by ridge push.
CAn ocean trench will be formed by slab pull.
DA mid-ocean ridge will be formed by ridge push.