Question 1033015
Natural and Rational:


a because some natural numbers are not rational numbers. 
b because all rational numbers are natural numbers. 
c  because natural numbers and rational numbers have no numbers in common. 
d  because all natural numbers are rational numbers,


d, the correct choice.
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Rational Number can be expressed as the ratio of Natural Number.  The counting numbers only exclude 0, and any natural number can be expressed as a ratio of a counting number to 1.