Respuesta :
Layer A is the geologic event, which layer is the oldest. Hence, option A is correct.
What is a geologic event?
A clearly defined occurrence in which one or more geological processes alter geological entities. Some examples of geologic event are aves, Deserts, Earthquakes, Glaciers, Tsunamis and Volcanoes.
A clearly defined occurrence in which one or more geological processes alter geological entities.
Thus, option A is correct.
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