What Decision Did Wal-Mart Make Due to the Difficulty of Hiring

What decision did Wal-Mart make due to the difficulty of hiring well-qualified workers,since the unemployment rate has declined?

A) Wal-Mart has increased advertising to inform the public that it is a good place to work.
B) Wal-Mart introduced incentive pay to augment base pay.
C) Wal-Mart decided to offer employees health insurance.
D) Wal-Mart substantially increased its starting pay rate.