An adverb clause is a dependent clause which cannot exist on its own, it has to be a part of the main, independent clause. So, having that in mind, the only dependent clause among these examples is 'when you return from California'. Therefore, the correct answer is B.
Oh I’ve read this book last year. So what can I remember about Jonas’ father from these details that the author shares with us is that now that Jonas’ father found a child named Gabriel, they have to give care with this child since their family signed this agreement.
