An increase to the entity's valuation allowance might be called for when:

a.The entity's assets have appreciated greatly in value, but there is no inclination to sell them.

b.The entity's last book profit occurred 10 years ago.

c.Both "The entity's last book profit occurred 10 years ago" and "The entity's assets have appreciated greatly in value, but there is no inclination to sell them".

d.Neither "The entity's last book profit occurred 10 years ago" nor "The entity's assets have appreciated greatly in value, but there is no inclination to sell them".