Answer:
C tail and gil sits
Explanation:
c !! <u>(tail and gill slits)</u>
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The runner burnt 8.39×10^5 nutritional Calories
1 Calorie = 4.184J
The runner burns 3.5×10^3kJ (3.5×10^6J) = 3.5×10^6/4.184 Calories = 8.39×10^5 nutritional Calories