Which of the Following Are True About Employee Stock Options

Which of the following are true about employee stock options? choose three)

A) They are never exercised early if the company does not pay a dividend.
B) They are commonly valued as though they are regular American options.
C) They are commonly valued as though they are regular American options, but with a reduced life.
D) They are commonly valued as though they are regular European options, but with a reduced life.
E) They are never worth more than regular American options with the same strike price and time to maturity.
F) There was a period of time during which their value had to be reported, but was not included on the income statement.