Which of the following is the best example of firm-specific risk?

	A.	AAA Pharmaceuticals withdraws a medication as it studies whether strokes five people suffered after taking the medication were related to the medication.
	B.	A global pandemic causes major disruptions in the economy.
	C.	As an arctic blast descends on North America, most of the United States is blanketed in snow or ice.
	D.	The Federal Reserve increases the money supply dramatically, leading to massive inflation.