Answer:
The correct answer option is D. 5.
Explanation:
We are given the following expression where 4 is to be divided by a fraction 1/5:
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
This can also be written as:

Now to find the quotient of this, we will take the reciprocal of the fraction in the denominator to change it into multiplication.

Therefore, ignoring the 1 in denominator, we can simply multiply 4 by 5.