Read the passage. after spending two years in the amazonian rainforest, marina acquired remarkable wilderness survival skills. when she returned to the us, she was eager to impress everyone with her fathomless knowledge of the amazonian culture and ways of living. which response most clearly analyzes the effect of the word fathomless in the passage, as opposed to a synonym such as extensive? fathomless means that marina's knowledge was without limits, while extensive implies she had a significant amount of knowledge. fathomless means that marina's knowledge was unbelievable, while extensive implies she had a large amount of knowledge. fathomless means that marina's knowledge was without restrictions, while extensive implies she had just enough knowledge. fathomless means that marina's knowledge was doubtful, while extensive implies she had a vast supply of knowledge.