What is the value of $$x^{2} - y^{2}$$?
I. $$(x - 2018)^{2} + (y + 2019)^{2} = 0$$
II. $$(x + 2018)^{2} + (y - 2019)^{2} = 0$$

A

if the statement I alone is sufficient to answer the question.

B

if the statement II alone is sufficient to answer the question.

C

if both the statements I and II are sufficient to answer the question but neither statements aloneis sufficient.

D

if both the statements I and II together are not sufficient to answer the question and additional data is required.