Pooma is researching the viability of implementing keystroke dynamics to authenticate users. She writes a report highlighting some of the benefits. Which of the following statements is she most likely to include in the report as well as consider in the implementation plan?

a$.$ The required security key is linked to the keyboard, making security breaches extremely difficult.

b$.$ It only requires a specialized keyboard that is not too expensive.

c$.$ No additional steps are required beyond entering the username and password.

d$.$ It requires no specialized hardware.

e$.$ It is widely used and very effective.