Under ASPE, which of the following statements best describes when goodwill should be tested for impairment?

a) Goodwill should be tested for impairment when events or changes in circumstances indicate that impairment may have occurred.

b) Goodwill should be tested annually for impairment regardless of the circumstances.

c) Goodwill should be tested for impairment annually and whenever events or changes in circumstance indicate that impairment may have occurred

d) Goodwill should only be tested for impairment when the company follows a policy to amortize its goodwill.