What was the central question in CASE $3\mathrm{.}1,$ Wal$-$Mart Stores, Inc. v$.$ Dukes $(2011)?$

Group of answer choices

Could Wal$-$Mart be properly sued in federal or in state court?

Could sufficient commonality among Wal$-$Mart employees be shown to certify the group as a class?

Could one Wal$-$Mart employee represent more than $1$ million other employees?

Did the employees waive their rights to arbitration under the Federal Arbitration Act?