If \(j\) is a multiple of \(12,\) and \(k\) is a multiple of \(21,\) then \(jk\) must be a multiple of which of the foll

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If \(j\) is a multiple of \(12,\) and \(k\) is a multiple of \(21,\) then \(jk\) must be a multiple of which of the following?

A. 8
B. 15
C. 22
D. 28
E. 35

Answer: D

Source: Princeton Review
Source: — Problem Solving |