What can cause a gap in the rock record a) lack of rock deposition. b) erosion. c) neither erosion nor lack of deposition. d) both erosion and lack of rock deposition

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you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.