A Pair of Parallel Conducting Plates Have Potentials of -17 $\times$

A pair of parallel conducting plates have potentials of -17 V and 55 V,respectively.An electron is ejected from the plate at potential -17 V and travels to the plate at 55 V.What is the change in the electron's potential energy as it makes this journey?

A) 6.1 $\times$ 10^-18 J
B) -6.1 $\times$ 10^-18 J
C) 1.2 $\times$ 10^-17 J
D) -1.2 $\times$ 10^-17 J