Which of These Statements Appears to Be True for Mars

Which of these statements appears to be true for Mars?

A) Plate tectonics has had little or no effect other than perhaps in the earliest times because Mars is small and cooled more rapidly than Earth so that a thick, solid crust formed.
B) Plate tectonics is only just beginning and will be important in the distant future because geologic processes happen more slowly on a small planet.
C) The oppressive heat on Mars has kept the planet's crust thin and prevented the onset of plate tectonics.
D) Plate tectonics is the dominant process creating large-scale surface features such as mountain ranges and volcanoes.