Which of the Following Statements Regarding the Lahars of Nevado

question 16

Multiple Choice

Which of the following statements regarding the lahars of Nevado del Ruiz in Columbia is true?

• A) The 1985 lahars that killed 22,000 people in the city of Armero were unprecedented and a complete surprise.
• B) The potential danger to Armero was not included in a hazards map published before this tragic event.
• C) The 1985 lahars were a virtual rerun of the events of 1845 and 1595 with the same places buried by the same types of lahars.
• D) The 1985 lahars that buried the city of Armero were the result of volcanic weather due to an ultra-Plinian eruption.

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Definitions:

Encryption Virus

A malicious program that searches for common data files and compresses them into a file using a complex encryption key, thereby rendering the files unusable.

Macro Virus

A virus that’s distributed by hiding it inside a macro.

Polymorphic Virus

A virus that changes its virus signature (the binary pattern that makes the virus identifiable) every time it infects a new file. This makes it more difficult for antivirus programs to detect the virus.

Macro Virus

A type of malware that is embedded in a document and can execute malicious sequences of commands upon opening the file.