To find out how many cups of oats Michael used, we can use the information that 1 cup of oats contains 103.4 grams of carbohydrates.
We can set up the equation:
\[ \text{Number of cups} = \frac{\text{Total grams of carbohydrates}}{\text{Carbohydrates per cup}} \]
Substituting the known values:
\[ \text{Number of cups} = \frac{568.7 \text{ grams}}{103.4 \text{ grams/cup}} \]
Calculating this gives:
\[ \text{Number of cups} = \frac{568.7}{103.4} \approx 5.5 \text{ cups} \]
So, the correct answer is 5.5 cups.