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.
This question is incomplete. Here's the complete question.
Read What Are Clouds?, By NASA, 2014
What connection does the author draw between clouds and weather on earth?
Answer:
According to the article, analyzing clouds is the way NASA gets a better understanding of Earth’s weather.
Explanation:
Clouds are a significant component of the process of raining and snowing and are also correlated to the temperature getting warmer or cooler depending on whether they reflect heat or make shade. With that in mind, the analysis of clouds provides vital information for weather forecasting.