All of the options listed can be considered benefits that an employer might offer, but the most commonly recognized benefits in a formal sense would be:
A. life insurance
C. A flexible spending account
Both of these options are typical employee benefits directly related to compensation packages.
However, options B, D, and E could also be seen as benefits or perks that create a positive work environment but are less formal compared to traditional benefits. Therefore, A and C are the most traditional benefits listed.