Real depression cannot be as easily overcome as

D) unfortunately, it was not so reliable as the latter 
E) it was toxic enough to kill an adult 
22. The death rate from heart disease has dropped by
half since the mid-1960s. However, studies
consistently find that the improvement has less to do
with treatment than with changes in diet and
lifestyle. In a 1988 study, Dr Lee Goldman, a Harvard
cardiologist, analyzed the decline in cardiac death
between 1968 and 1976. Even though he could not
account for all of it, he traced more than half to the
drop in cigarette smoking and cholesterol intake.
Roughly 20 per cent of the drop was due to heart and
blood-pressure drugs, and only 3.5 per cent to
bypass surgery. Goldman has lately updated his
findings, and he says the same basic lesson still
holds: "The impact of the costliest interventions is
minimal."
The recent drop in deaths from cardiac
diseases .......... 
A) is owing to people's eating less than they need 
B) is due to blood-pressure drugs and carefully
watched diets 
C) can be attributed to bypass operations 
D) can be put down to medical treatment 
E) can be associated with changes in people's eating
habits and lifestyles 
23. The death rate from heart disease has dropped by
half since the mid-1960s. However, studies
consistently find that the improvement has less to do
with treatment than with changes in diet and
lifestyle. In a 1988 study, Dr Lee Goldman, a Harvard
cardiologist, analyzed the decline in cardiac death
between 1968 and 1976. Even though he could not
account for all of it, he traced more than half to the
drop in cigarette smoking and cholesterol intake.
Roughly 20 per cent of the drop was due to heart and
blood-pressure drugs, and only 3.5 per cent to
bypass surgery. Goldman has lately updated his
findings, and he says the same basic lesson still
holds: "The impact of the costliest interventions is
minimal."