Which of the Following Is True, According to Newton's Second

Which of the following is true, according to Newton's second law?

A) The acceleration of an object is proportional to its mass and inversely proportional to the net force on it.
B) The acceleration of an object is proportional to the product of its mass and the net force on it.
C) The acceleration of an object is proportional to the net force on it and inversely proportional to its mass.
D) The acceleration of an object is equal to the net force on it.
E) The acceleration of an object depends on all the forces on it, both internal and external.