Answer: B) The amount that something can hold. Usually means volume, such as milliliters (ml) or liters (l) in Metric, or pints or gallons in Imperial.
The area of a rectangle is A = L * W. We have the area as 323 and the length as 17. Filling in our formula for area then, 323 = 17W. Divide both sides by 17 to solve for the width. W = 19