Have some point bc i have too many

Ineed on my history if anyone can check out the last few questions i posted and i will be posting !

The head restraint should be adjusted so that it reaches a. the top of your ears b. the base of your skull c. the top of the head

Martha is designing a single-player game. her manager suggests that she plan the design to incorporate future modifications. which principle of game design relates to planning for future modifications?