Which of the following statements about the “two-part form” claim is (are) correct? I. it recites all or some of the elements of a known article, process, composition, or combination in the preamble to the claim. II. it may include a transition such as “wherein the improvement comprises” and recite in the body of the claim only the new or modified elements, or recite the improvement. III. it may be used in the form of a dependent claim.