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

While for$-$profit service firms market tangible products, nonprofit organizations market intangible products.

Both often require the customer to be present during the production process.

While for$-$profit service firms vary greatly from producer to producer, nonprofit organizations are uniform across producers.

Both vary greatly from day to day, but with the same producer the day$-$to$-$day variations are eliminated.