HELPP!!! ( AND PLEASE NO WEBSITES) Prior to 1989 many Eastern European nations .
a.
were not industrialized
c.
did not have laws about pollution
b.
had systems in place to control pollution
d.
began cleaning up pollution

Explanation:

Eastern Europe is the region of the European continent between Western Europe and Asia. There is no consistent definition of the precise area it covers, partly because the term has a wide range of geopolitical, geographical, ethnic, cultural, and socioeconomic connotations. Russia, located in Eastern Europe, is both the largest and most populous country of Europe; spanning roughly 40% of the continent's total landmass, with over 15% of its total population.

BRAINILIEST PLEASE

leonardo was the supreme renaissance painter, scientist, inventor, and polymath. da vinci is widely regarded as one of the greatest minds the world has ever produced. he was interested in everything from music to art and science. da vinci was an immense creative force at the start of the renaissance period. amongst his many works was the immortal painting – the mona lisa.

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b. she founded a new dynasty that ruled egypt for generations.