Final answer:
The correct measurement of urinary output is 300 cubic centimeters (cc), which is a standard volume used in medical contexts to measure fluid output.
Step-by-step explanation:
Urinary output is usually measured in milliliters (mL) or cubic centimeters (cc), which are equivalent. Therefore, 300 cc is a standard way to represent urinary output in a medical context. When reviewing the other options, 2 cups would be equivalent to 16 ounces, 40 oz is not a typical measure for urine output, and 1 quart equals 32 ounces or about 946 cc, which is a larger volume typically considered for urinary output in a given period.