10
QuizMultiple Choice
Unit Test — Unit test
Question 10 • TX-US History Studies Since 1877 B
This graph shows life expectancy in the United States.Which factor best explains why the graph changes from 1990 to 2010?
Answer
A
New technology protects soldiers from risky reconnaissance missions.B
New technology allows farmers to grow genetically modified crops.C
New technology allows us to find and use new energy sources.D
New technology has improved medical imaging and surgery.