Question

why might a small - business owner choose a simple ira over a sep ira?
to reduce the administrative costs involved
to allow for higher contribution limits
to allow both employer and employee contributions
to access a wider range of investment options

Explanation:

A SIMPLE IRA allows both employer and employee contributions, which is a key differentiator from a SEP - IRA where only employers can contribute. Administrative costs are not the main differentiator, SEP - IRAs often have higher contribution limits, and investment options are not the primary reason for choosing a SIMPLE IRA over a SEP - IRA.

Answer:

To allow both employer and employee contributions