Which of the following events that occurred after the balance sheet date but before issuance of the financial statements would require adjustment of the accounts before issuance of the financial statements?
a) Loss on a lawsuit, the outcome of which was deemed uncertain at year end
b) Loss of plant as a result of fire
c) Loss on an uncollectible account receivable resulting from a customer's major flood loss
d) Changes in the quoted market prices of securities held as an investment