(B) is incorrect because it is too strongly worded. Although the passage may support the idea that planes sometimes land on adjacent runways at the same time in good weather, this answer choice says that this phenomena is "likely...at any given time." How do we know that this scenario is so probable and frequently occurring? We don't, as the passage does not support that. Therefore, we can rule out (B).
Does that make sense? Please let us know if you have any other questions!