Sophia's average score on six tests is $$82$$. Her average scores on the $$7^{}\text{th}$$ and $$8^{}\text{th}$$ tests is $$98$$. What is her average score on all eight tests? ． 
选项为:A:$$86$$  B:$$88$$  C:$$90$$  D:$$94$$  请回答其中一个选项.