Question: In computer architecture, which of the following correctly matches the fundamental unit used in the CPU, cache, and main memory respectively?

\[ \begin{array}{ll} \textbf{A.} & \text{CPU $\rightarrow$ Page,\ \ Cache $\rightarrow$ Word,\ \ Memory $\rightarrow$ Block} \\[6pt] \textbf{B.} & \text{CPU $\rightarrow$ Block,\ \ Cache $\rightarrow$ Page,\ \ Memory $\rightarrow$ Word} \\[6pt] \textbf{C.} & \text{CPU $\rightarrow$ Block,\ \ Cache $\rightarrow$ Word,\ \ Memory $\rightarrow$ Page} \\[6pt] \textbf{D.} & \text{CPU $\rightarrow$ Word,\ \ Cache $\rightarrow$ Block,\ \ Memory $\rightarrow$ Page} \end{array} \]

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