Answer: B) He feels happy again.
Step-by-step explanation: In the given lines of the poem by William Wordsworth, we can see that the bolded line (that is in the last stanza) "my heart with pleasure fills" means that the speaker feels happy again, in the final lines, he expresses that when he is thinking, on his couch, or feeling lonely, he thinks about the daffodils and "his heart with pleasure fills" meaning that he feels happiness again.