1. The problem asks for the best method to measure 500 grams of flour when only a measuring cup is available. 2. Using a conversion factor from the internet can be helpful, but may not be fully accurate due to flour density and type. 3. Estimating with a standard drinking glass is not precise and can easily cause error. 4. Using the same number of cups as grams (i.e., 500 cups) is unrealistic and clearly wrong. 5. The most accurate and reliable method is to weigh the flour using a kitchen scale designed for measuring mass, ensuring precision in the recipe. 6. Therefore, the BEST course of action is to weigh the flour using a kitchen scale for accuracy.