Question

__ is software that is completely free to use without any specified time restrictions.
freeware
shareware
subscription software
open source software

Explanation:

Freeware is software that can be used for free without time - limits. Shareware often has a trial period. Subscription software requires regular payments. Open - source software has its source code available, but the key here is the free - to - use without time restrictions which defines freeware.

Answer:

Freeware