For the figure

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For the figure

A

$\overrightarrow A + \overrightarrow B = \overrightarrow C $

B

$\overrightarrow B + \overrightarrow C = \overrightarrow A $

C

$\overrightarrow C + \overrightarrow A = \overrightarrow B $

D

$\overrightarrow A + \overrightarrow B + \overrightarrow C = 0$
For the figure