There are three basic requirements for a patent to be granted. The subject of the patent application must be$\_\_\_\_\_\_\_\_.$

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Part $1$

A$.$

$$useful$,$ novel in relation to prior arts in the$$ field, and not obvious to a person of ordinary skill in the field

B$.$

$$useful$,$ scientific, and novel in relation to prior arts in the field

C$.$

$$useful$,$ difficult to$$ copy, and novel in relation to prior arts in the field

D$.$

$$rare$,$ difficult to$$ copy, and not obvious to a person of ordinary skill in the field

E$.$

based on cutting edge science or$$ technology, not obvious to a person of ordinary skill in the$$ field, and rare