If every pair from among the equations x² + ax + bc = 0, x² + bx + ca = 0 and x² + cx + ab = 0 has a common root, then

The sum of the three common roots is 2(a+b+c)

The product of the three common roots is abc

The product of the three common roots is a²b²c²

The sum of the three common roots is (a+b+c)