Data from the World Bank for the Top and Bottom

Data from the World Bank for the top and bottom quintiles of the distribution of income in Costa Rica for two years are presented in Table: Costa Rica Income Distribution, Top and Bottom Quintiles.
Which of the following claims CANNOT be made conclusively for the time period based on the data in the table?
$${ \text { Table: Costa Rica Income Distribution, Top and Bottom Quintiles } } \\\begin{array} { | l | l | l | } \hline \text { Year } & \begin{array} { l } \text { Percent of income earned } \\\text { by the top quintile }\end{array} & \begin{array} { l } \text { Percent of income earned by } \\\text { the bottom quintile }\end{array} \\\hline 1986 & 39.6 \% & 5.2 \% \\\hline 2016 & 54 \% & 4.2 \% \\\hline\end{array}$$

A) Costa Rica's distribution of income became more unequal.
B) The top quintile percentage of total income became a larger multiple of the bottom quintile percentage of total income between 1986 and 2016.
C) Average income in the bottom quintile was lower in 2016 than it was in 1986.
D) The top quintile earned a higher share of total income in 2016 than in 1986.