Prompt

What is the effect of applying the `?` operator to an `Option<T>` expression inside a function returning `Option<U>`? A) It unwraps the `Some(T)` value or returns `None` early from the enclosing function. B) It panics if the value is `None`. C) It converts the `Option<T>` into a `Result<T, NoneError>`. D) It wraps the resulting computation in a future. Reply with the letter of the correct option (A, B, C, or D).

Expected output

A