\textbf{(2018 Math league, Primary 5, Question \#13)}  Of the following, which is the sum of two consecutive integers?  下列哪个选项是$$2$$个连续整数的和？ 
选项为:A:$$111111$$  B:$$222222$$  C:$$444444$$  D:$$888888$$  请回答其中一个选项.