Final answer:
The volunteer took 3 cups (0.75 quarts) and 7 quarts, equals 7.75 quarts. Considering the provided options, there appears to be a mistake in the question as the correct total is not listed.
Step-by-step explanation:
The question asks to calculate the total amount of soup a volunteer took home in quarts. The volunteer took 3 cups and 7 quarts. To find the total amount, we first need to convert cups into quarts. Given that 4 cups equal 1 quart, we can use a simple proportion: 4 cups/1 quart = 3 cups/x quarts. Solving for x gives us 0.75 quarts. Adding this to the 7 quarts, the volunteer took a total of 7.75 quarts of soup. However, based on the provided answer options, it seems there may be a mistake since 7.75 is not an option. If we adjust the values to be '3 cups to quarts,' the volunteer would have 0.75 (3/4) quarts plus the 7 quarts, which equals 7.75 quarts. The question likely intended for a different value or there may have been an error in the options given.