How did glasnost and perestroika contribute to the fall of the soviet union?
a. they created difficult economic circumstances that led to a series of small revolutions.
b. the increased military strength in each republic made independence possible.
c. they brought the outside world and different economic and political options to the people. <
d. the chance to elect representatives gave the impetus for change.

the andes or andean mountains (spanish: cordillera de los andes) are the longest continental mountain range in the world, forming a continuous highland along the western edge of south america. this range is about 7,000 km (4,300 mi) long, about 200 to 700 km (120 to 430 mi) wide (widest between 18° south and 20° south latitude), and of an average height of about 4,000 m (13,000 ft). the andes extend from north to south through seven south american countries: venezuela, colombia, ecuador, peru, bolivia, chile and argentina.

from wikipedia

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