Rays Robots Company has seen its inventory turnover ratio increase from $2x$ to $4x($from last year to this year$).$ What does this mean?

The company sells all of its inventory half as often vs$.4x$ as it did last year.

The company carries twice as much inventory as it used to$.$

The company sells all of its inventory twice as often in a year $(4xvvs\mathrm{.}2x)$ compared to last year.

The company will be out of inventory in $6$ months.