Question

the crisis - mapping tool ushahidi

a. shows that a free software product can have great value.
b. relies on people using their desktop computing power to help others.
c. is only available in the united states.
d. prevents two - way dialog between people.

Explanation:

Ushahidi is a free and open - source crisis - mapping tool. It has been used in various parts of the world (so option C is wrong). It allows for user - generated content and two - way communication (so option D is wrong). It does not rely on desktop computing power in the way distributed computing projects do (so option B is wrong). As a free software, it has demonstrated great value in disaster response, human rights monitoring, etc.

Answer:

A. shows that a free software product can have great value.