A little confused (English Grammer)

MBA CAT 2023
1

Need help on Possessive case type:Can anyone please tell me which one is correct:A) If case fails, previous day’s output files will be usedorB) If certain case fails, output files from the previous day will be used

2

Need help on Possessive case type:

Can anyone please tell me which one is correct:

A) If case fails, previous day's output files will be used

or

B) If certain case fails, output files from the previous day will be used