According to the theory of plate tectonics, how do two plates interact to form chains of islands called island arcs?
a. a continental plate slides along an oceanic plate at a convergent boundary.
b. an oceanic plate sinks beneath another oceanic plate at a convergent boundary.
c. an oceanic plate sinks beneath a continental plate at a convergent boundary.
d. a continental plate collides with another continental plate at a convergent boundary.