Let's calculate Elizabeth's account balance each day based on the transactions provided.
- Initial balance on Sunday: $252.00
Monday:
- Debit: $114.60
- Credit: $150.00
- Balance after Monday = $252.00 - $114.60 + $150.00 = $287.40
Tuesday:
- Debit: $79.68
- Balance after Tuesday = $287.40 - $79.68 = $207.72
Wednesday:
- Debit: $161.39
- Balance after Wednesday = $207.72 - $161.39 = $46.33
Thursday:
- Debit: $57.40
- Balance after Thursday = $46.33 - $57.40 = -$11.07
Friday:
- Debit: $22.85
- Credit: $75.00
- Balance after Friday = -$11.07 - $22.85 + $75.00 = $41.08
Saturday:
- Debit: $140.55
- Balance after Saturday = $41.08 - $140.55 = -$99.47
Now, checking the balances, Elizabeth first goes into overdraft (negative balance) on Thursday.
Therefore, the answer is: b. Thursday