What do flextime and flexplace have in common? both allow you to work alternative hours. both are work accommodations. both allow you to work at a different location. all of the above

I would say that the correct answer is that both are work accommodations.
They don't both offer alternative hours - only flextime does, whereas flexplace offers you the opportunity to work from a place of your choosing - for example, a cafe, or your home. Only flexplace allows you to work at a different location - flextime doesn't; you still have to go to your office to work, but you can choose when. And finally, the last option is also incorrect. 

Where is the excerpt? it’s not attached