Which of the following sentences contains an opinion statement by the author?
1) Among the first females awarded a degree from Oxford University, Dorothy L. Sayers proved to be one of the most versatile writers in post-war England.
2) Sayers was born in 1893, the only child of an Anglican chaplain, and she received an unexpectedly good education at home.
3) Her translation of Dante's Inferno gained her respect for her ability to convey the poetry in English while still remaining true to the Italian terza rima.
4) Sayers, for reasons known only to her, declined.