Concept:After "I wish", English uses a verb one tense back to show that the wish is unreal (the situation is not true).
I wish + simple past: an unreal present or habitual situation (I wish he
returned earlier = he does not return early).
I wish + past perfect: regret about one past event (I wish he
had returned earlier).
Explanation:"Returns", "has returned" and "is returning" are real (present) forms, so they cannot follow "I wish".
"Had returned" is not among the options, so the only back-shifted form given is the simple past "returned".
"I wish the driver returned earlier" means the driver usually comes back late and the speaker would like him to come back earlier.
Key point: Never use a present form after "I wish"; move the verb one tense back.
Answer:Option A (returned)