A \( { }^{+} \mathrm{CH}_{2} \mathrm{CH}_{2} \)
B \( { }^{+} \mathrm{CH}_{3} \)
C \( { }^{+} \mathrm{C}\left(\mathrm{CH}_{3}\right)_{3} \)
D \( { }^{+} \mathrm{CH}\left(\mathrm{CH}_{3}\right)_{2} \)
Correct Answer: Option C
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