Which is a valid abstract class?
A. public abstract class Car {
protected void accelerate();
}
B. public interface Car {
protected abstract void accelerate();
}
C. public abstract class Car {
protected final void accelerate();
}
D. public abstract class Car {
protected abstract void accelerate();
}
E. public abstract class Car {
protected abstract void accelerate() {
//more car can do
}}
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