(Job related) Which schedule would you choose ?

I'm going to be asking my job if I can work part time for a few years. I just had a baby and want to be able to spend as much time as possible with her but in hopes of still keeping my job. So Instead of quiting i will be proposing one of these options below. I dont know if I would rather work less hours each day or work my normal 8 hours but work less days.

which option would you choose? please share why you would choose that option.

Option A

work Monday-Friday 8-2pm (6 hours each day) weekends off

or

Option B

work Tursday, Wednesday and Friday only (8 hours) so I would have Mondays and Thursdays off on top of having the weekend off.

**I would like to add that my job is pretty flexible that's why I feel comfortable asking this request. If for any reason they say to me that they cant accommodate me then I would put my 2 weeks notice in. Like I mentioned this is my effort in being able to spend more time with my child and still keep my job.