If Apple's R&D Intensity and Marketing Intensity are much less than Blackberry's, how and why is Apple able to significantly outperform Blackberry?

O Apple generates more from its fixed assets.

O Apple turns over its inventory faster.

Apple gets paid faster, but pays its own creditors more slowly.

O All of the above answers $($A$,$ B$,$ and C$)$ are correct.

O None of the above answers $($A$,$ B$,$ C$,$ and D$)$ are correct.