The figure above represents a partial step of a 2's complement operation in progress. Only the columns corresponding to the sign (C_n) and two subsequent positions, (C_n-1) and (C_n-2) are shown. The sign column bits for the two numbers are depicted in red. The carry in the column C_n-2 is shown in blue. Which of the assertions is true?

There is not enough information to figure out if the result will be an overflow.

An overflow will occur.

An overflow will not occur.

If the carry for C_n-2 was 0 then an overflow will occur.