Read the passage below and answer the question that follows.
'The theory of plate tectonics, a concept that revolutionized Earth sciences, posits that the Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core. This movement is responsible for a wide range of geological phenomena, including earthquakes, volcanic eruptions, and the formation of mountain ranges. Before this theory was widely accepted in the mid-20th century, various other hypotheses were proposed to explain these phenomena, but none could provide a comprehensive and unifying framework. The concept of continental drift, a precursor to plate tectonics, was initially met with significant skepticism primarily due to the lack of a clear mechanism to explain how continents could move.'
Which of the following best describes the primary purpose of this passage?
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A
To argue against the theory of plate tectonics
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B
To provide a brief overview and historical context of the theory of plate tectonics
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C
To detail the various types of geological phenomena
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D
To explain the composition of the Earth's mantle and core