A lecturer believes that less than 40% of all students understand hypothesis testing. To determine whether or not there is strong evidence to support his belief he tests a random sample of 50 students which shows the proportion of students who understand hypothesis testing to be 28%. The lecturer would

		A.not reject Ho at 5% but reject Ho at 1% level of significance
		B.reject Ho at 5% but not reject Ho at 1% level of significance
		C.reject Ho at both 5% and 1% level of significance
		D.not reject Ho at both 5% and 1% level of signifiicance