QUESTION TYPE: Strengthen
ANALYSIS: We need to think of a way to strengthen the idea that South America and Africa were once linked. The key here is to remember that this drift occurred a long, long, long time ago, in prehistoric times. So our evidence needs to be ancient.
Human evidence won’t be very useful.
___________
- CORRECT. This is the best answer. The rock is rare and very old, and exists in the area the continents would have been joined.
- Answers B through E are tempting, but are all too recent. I’ve got a better explanation for why there are West Africans in Brazil: the Portuguese brought them there as slaves a few hundred years ago.
- The climate of California resembles that found in the Mediterranean. That does not mean they were once attached.
- This is very vague. “Some” tribes speak languages that are “linguistically similar” to those spoken by “certain” western African peoples. Could well be a coincidence. The continents drifted apart long ago, and many tribes have surely changed locations and languages since then.
- This refers to current plants, which are easily moved. They could have been brought over by the slave traders (answer choice B). Many plants in North America come from Europe.
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