Which of the following statements are true of long-term investments? a. They can include assets not used in operations, such as investments in land. b. They generally only include investments that will mature in less than 1 year. c. On the balance sheet, they are reported with noncurrent assets. d. They are always easily sold and therefore qualify as being marketable. e. They include debt securities intended to be held for multiple years until maturity. f. They include cash equivalents, which typically include investments that mature in less than 3 months