All lines with equation a x+b y=c such that a, b, c form an arithmetic progression pass through a common point. What are the coordinates of that point?

**Answer Choices**

A. (-1,2)

B. (0,1)

C. (1,-2)

D. (1,0)

E. (1,2)

All lines with equation a x+b y=c such that a, b, c form an arithmetic progression pass through a common point. What are the coordinates of that point?

**Answer Choices**

A. (-1,2)

B. (0,1)

C. (1,-2)

D. (1,0)

E. (1,2)