Which of the following statements are true of long-term investments?

a. They can be considered cash equivalents.

b. They can include assets not used in operations, such as investments in land.

c. They generally include investments that will mature in 3 to 12 months.

d. They are reported with noncurrent assets on the balance sheet.

e. They are always easily sold and therefore qualify as being marketable.

f. They can include bonds and stocks not intended to be sold in the near future.