单选题：Just when you had figured out how to manage fat in your diet

Just when you had figured out how to manage fat in your diet，researchers are now warningagainst another common mealtime pitfall(陷阱)--salt．
A study by researchers at the University of California，San Francisco(UCSF)，Stanford University and Columbia University shows that even a 46 decrease in daily salt intake(摄人)can lead to dramatic health benifit.The authors 47 an annual drop of as many as l20，000cases of heart disease,66,000 48 of stroke and 99，000 heart attacks 49 by highblood pressure after a 3-9—per—day reduction in salt．
The advantages，not surprisingly，were greater for African Americans，who ale more likely tohigh blood pressure than other ethnic groups，and for the elderly，since blood vesselsstiffen with age，which Call lead to higher blood pressure
“Everyone in the U．S．is consuming salt far in 51of what is good for them，’’sayslead author Dr．Kirsten Bibbins Domingo of UCSF．“What we are suggesting is that a population
wide effort to reduce salt intake，even 52 ，will have health benefits．’’
The team conducted a computer—based analysis to determine the 53
of a 3-g--perdayreduction in salt intake on rates of heart disease and death．They also calculated the cost savingsemerging from the amount of disease that would be 54because of lower blood pressure．The conclusion：by cutting salt intake nationwide，the U．S．could save$10 billion to$24 billion55 in health care costs．
根据以上内容，回答题．
第46题答案是 ______ A． accidents
B． annually
C． avoided
D． caused
E． considerable
F． develop
G． documented
H． dramatically
I． excess
J． impact
K． instances
L． modest
M． revised
N． slinhtly
O． undertake