Question: 4. A scientist developed an alertness scale for measuring the alterness of cats. Following is a graph of alterness versus time for a particular cat that was observed over a period of 90 minutes. Between which two points on the graph was the cat startled by a dog barking? Alertness B B and C 0 10 20 30 40 50 60 70 80 90 Time (min) D and E E and F Alertness of Cat F and G D

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