Final answer:
The speaker's persistent questioning of the raven, and the frustration it signifies, suggests a state of deep despair and a refusal to accept the finality of loss.
Step-by-step explanation:
The persistent questioning of the raven in the poem suggests that the speaker's state of mind is one of deep despair and a desperate search for meaning in his sorrow. The repeated word 'Nevermore' from the raven only serves to sink the speaker further into his grief. Given the bird's unchanging response, it is evident that b) the speaker is annoyed and frustrated. This emotion manifests in the speaker's insistent questioning as a refusal to accept the finality of the raven's answers, perhaps indicative of his unwillingness to come to terms with his loss and the hopelessness of his situation.