What is the primary reference for the Palermo Technical Scale, used for?

Question

A“Quantifying the risk posed by potential Earth impacts” 2002 by Chesley et al.

B"Mitigation of hazardous comets and asteroids" 2004, by Belton

C"Apophis: The story behind the scenes" 2008 by Sansaturio and Arratia

D"On coordinated approach to the problem of asteroid-comet impact hazard" 2010 by Shustov

Select from the options above.

Correct Option: 1  

Explanation:
“Quantifying the risk posed by potential Earth impacts” 2002 by Chesley et al.
The scale is used by specialists in the field to quantify in detail the level of concern warranted for a future potential impact possibility between Earth and near-Earth objects.