<u>Answer:</u>
The correct answer option is B. 2.1 inches.
<u>Step-by-step explanation:</u>
We are given that the cylinder is to hold 42 in³ of liquid while the height of this container is 3 inches tall.
We are to find the best approximation for the radius of this container.
We know that the formula for the volume of a cylinder is given by:
<em>Volume of cylinder =
</em>
Substituting the given values in the above formula to get:



r = 2.1 inches