Final answer:
The poet of the lines provided is Samuel Taylor Coleridge, from his poem 'The Rime of the Ancient Mariner,' making option C the correct answer.
Step-by-step explanation:
The lines '"The spirit who bideth by himself / In the land of mist and snow / He loved the bird that loved the man / Who shot him with his bow"' are from the poem 'The Rime of the Ancient Mariner' by Samuel Taylor Coleridge. This poem is a well-known work of the Romantic period, with Coleridge being one of the prominent Romantic poets alongside William Wordsworth, with whom he was associated in the Lake Poets group. Therefore, the correct answer is C) Samuel Taylor Coleridge.