A work sampling study requires an acceptable error level of 10 percent and a 95 percent confidence. If the sample proportion (p) is as large as 50 percent then the adequate sample size should be about ____. Hint: rely on the table below.

Required confidence level (%)	z-value
90	1.65
95	1.96
95.45	2.00
98	2.33
99	2.58
99.73	3.00

	A.	85
	B.	62
	C.	89
	D.	78
	E.	96