Emily Dickinson wrote about what she knew and about what intrigued her. A keen observer, she used images from nature, religion, law, music, commerce, medicine, fashion, and domestic activities to probe universal themes: the wonders of nature, the identity of the self, death and immortality, and love.
It would be letter a, since an interrogative sentence is question. Since the first answer is the only one with a question mark, the answer is a.
Id say that the complete predicate would be “have made a decision” and the simple predicate would be “have” or “have made.” Sorry if im wrong. Good luck