Which of the Following Statements Is True in Comparing For-Profit

Which of the following statements is true in comparing for-profit service firms and nonprofit organizations?

A) While for-profit service firms market tangible products,nonprofit organizations market intangible products.
B) Both often require the customer to be present during the production process.
C) While for-profit service firms vary greatly from producer to producer,nonprofit organizations are uniform across producers.
D) Both vary greatly from day to day,but with the same producer the day-to-day variations are eliminated.