If you look on openstudy.com they have lots of answers to this :-)
I'm thinking about India or South Africa, but I am pretty sure it is India because South Africa had Mandela for a really long time.
Answer:
A, They mapped the land and reached the Pacific Ocean, helping the US set claim.
Add-on:
I hope this helped at all. I'm sorry if its incorrect.
<span>We're is Dallas using latitude and longitude
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that would be 32.7767° N, 96.7970° W