Which of the Following Is Accurate Regarding Income Statistics

Which of the following is accurate regarding income statistics?

A) Current annual income is also an accurate indicator of relative economic status for the same individual over a longer period such as a decade or lifetime.
B) When there is substantial income mobility, one's current position in the income distribution will not be a very good indicator as to what one's position will be a few years in the future.
C) Recent studies indicate that there is a strong positive relationship between the relative income position of a family and the relative income position of their children and grandchildren.
D) Even though annual income data camouflage the fact, high-income earners generally maintain their status year after year, while those with low current incomes tend to stay poor year after year.