In the following sentence/ a part of the sentence is underlined. Below are given alternatives to the underlined part at (a), (b), (c) which may improve the sentence. Choose the correct alternative. In case no improvement is needed, your answer is (d).
Your previous project was only failed because you did not persevere yourself in it.
failed only because you did not persevere
failed only because you did not persevere for it
only failed because you did not persevere
No improvement
A.
failed only because you did not persevere