Why does the author assert that the development of technology has led to a higher level of
A.Looking back on the "good old days" makes modern man's life all the more stressful.
B.Now that less work is physical and more is mental, it is relatively difficult to remove oneself —physically and mentally —from it.
C.The sophisticated communication technology is keeping busy men and women "within call" no matter whether they are at home or on vacation.
D.Both B and C.