There have been 20 presidents since 1900
In 1990 the country that invaded Kuwait causing the United States and United Nations to intervene is Iraq.
They operate, maintain or repair geothermal power plants and commercial and residential geothermal heating installations. (googled this for you)
Answer: option b is the answer
If this is a essay just say. the Mayas most remarkable achievement was the number system and say how it cjanged the world I did this essay in 6th grade just talk about how the number system was a good achievement