If $\vec{a} \times \vec{b}=\vec{b} \times \vec{c}=\vec{c} \times \vec{a}$ then $\vec{a}+\vec{b}+\vec{c}=$

• A

  abc
• B

  -1
• Correct answer
  C

  0
• D

  2

Hence, the correct answer is option: 'C'.