If \(\vec{a}, \vec{b}\) and \(\vec{c}\) are three vectors such that \(\vec{a}+\vec{b}+\vec{c}=\vec{0}\), where \(\vec{a}\) and \( \vec{b}\) are unit vectors and \(|\vec{c}|=2\), then the angle between the vectors \( \vec{b}\) and \(\vec{c}\) is:
1
60°
2
90°
3
120°
4
180°