Which of the following statements are true of long-term investments? They are held as an investment of cash available for current operations. They can include funds earmarked for a special purpose, such as bond sinking funds They can include investments in trading securities. They can include debt securities held-to-maturity They are always easily sold and therefore qualify as being marketable They can include debt and equity securities available-for-sale. They can include bonds and stocks not intended to serve as a ready source of cash