The positions of rational numbers a and BC on the number axis are shown in the figure, simplifying | B-A | + | B + C | - | a-c| _ A___ b______ 0______ c_ →

The positions of rational numbers a and BC on the number axis are shown in the figure, simplifying | B-A | + | B + C | - | a-c| _ A___ b______ 0______ c_ →

According to the meaning of the title
B-A>0
B+C