How Does Energy Conservation Apply to MCAT Physics Problems?

Nick tringali
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Homework Statement
Question number 14. I figured it would have to be B because Te1=Te2. I feel like both b and c were correct. Why is it not B?
Relevant Equations
Pe=mgh
Ke=.5mv^2
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The book states the correct answer is C I chose B
 
I just figured this out by myself, thank you anyways!
 
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