You are processing millions of files in an Oracle Cloud Infrastructure (OCI) Object Storage bucket. Each time a new file is created, you want to send an email to the customer and create an order in a database. The solution should perform and minimize cost. Which action should you use to trigger this email? (Choose the best answer.) 

Answer options:

A. Schedule a cron job that monitors the OCI Object Storage bucket and emails the customer when a new file is created.
B. Use OCI Events service and OCI Notification service to send an email each time a file is created.
C. Schedule an Oracle Function that checks the OCI Object Storage bucket every minute and emails the customer when a file is found.
D. Schedule an Oracle Function that checks the OCI Object Storage bucket every second and emails the customer when a file is found.

C