A.By judging to what extent they can eliminate the risks.B.By estimating the possible loss of lives and property.C.By estimating the frequency of volcanic eruptions.D.By judging the possible risks against the likely benefits.
A.By judging to what extent they can eliminate the risks.
B.By estimating the possible loss of lives and property.
C.By estimating the frequency of volcanic eruptions.
D.By judging the possible risks against the likely benefits.