Final answer:
To convert 30 mL to ounces, divide by the conversion factor of 30 mL/ounce.
Step-by-step explanation:
To convert ounces to milliliters, we can use the conversion factor: 30 mL = 1 ounce. So, to convert 30 mL to ounces, we divide by the conversion factor: 30 mL / 30 mL/ounce = 1 ounce. Therefore, the correct answer is (C) 30 mL.