Assuming that all other conditions are identical, buildings on a slope can:
a) Cause landslides by adding extra weight to the slope
b) Prevent landslides by firmly holding loose debris down
c) Prevent landslides because the loose rocks and debris on a slope are cleared off during construction
d) Have no influence on landslides
e) None of the above is correct
Ans: a) Cause landslides by adding extra weight to the slope
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