A. to track hurricanes and issue warnings
B. to avoid confusion
C. to stay at home
D. to be given to tropical storms
E. to make predictions
F. to kill at least 15 people
The responsibility of the US National Weather Service is ______.

A. exposure to even tiny amounts of radiation is fatal
B. the effect of exposure to radiation is slow in coming
C. radiation is avoidable in space exploration
D. astronauts in spacesuits needn’t worry about radiation damage

A. Different effects of caffeinated coffee and decaf on sleep,
B. Different findings of Lotan Shilo and a team about caffeine.
C. The fact that the subjects slept 415 minutes per night after drinking decal.
D. The proof that the subjects took half an hour to fall asleep.