Final answer:
William Wordsworth wrote "Tintern Abbey" reflecting on his return to the Wye Valley after a period of five years. The correct answer is (a) Five years.
Step-by-step explanation:
The question refers to the period of time that had elapsed since William Wordsworth revisited the Wye Valley and wrote the poem "Lines Composed a Few Miles Above Tintern Abbey". In the poem itself, Wordsworth mentions:
'Now, of my threescore years and ten, (C)
Twenty will not come again, (C)
And take from seventy springs a score,
It only leaves me fifty more. (D)'
This excerpt clearly indicates that five years had passed since Wordsworth's previous visit to the spot. Thus, the correct answer to the question is (a) Five years. The poem reflects on the changes in both the poet and the landscape and is a seminal work of Romantic poetry, expressing the poet's feelings about the sublime natural environment and his philosophical musings on life and time.