During the 1960s and 1970s, the annual number of people who visited

Condition: During the 1960s and 1970s, the annual number of people who visited the Saharan desert increased continually, and many new desert safari camp sites were built.

The intended input: The annual number of people who visited the Saharan desert increased continually.

Unintended Outcome: The number of visitors to these desert camps who were caught in sand storms decreased, even though there was no reduction in the annual number of sand storms in the Saharan desert.


Questions basically asks to resolve the above mentioned paradox.

A.Sand storms were most likely to happen when a large amount of sand is displaced by strong winds
B.Sand storms destroyed at least some buildings in the Saharan desert every year.

If people already have accurate information about which locations are likely to be in the path of the sand storm, they are certain to avoid those paths. Hence leading to the aforementioned outcome.
D.The average length of stay for people visiting the Saharan desert increased slightly.
E.Construction of desert camps often led to the clearing of vegetated areas that had helped prevent sand storms.