Final answer:
To convert teaspoons or tablespoons to milliliters, you should multiply by 5, since 1 teaspoon is approximately equal to 5 mL.
Step-by-step explanation:
When converting teaspoons (tsp.) or tablespoons (tbs.) to cubic centimeters (cc) or milliliters (mL), you refer to a unit conversion table. According to the LibreTexts reference, 1 teaspoon is approximately equal to 4.93 mL which can be rounded to 5 mL. Therefore, when converting teaspoons to milliliters, we should multiply by 5 (Option A).