Exam SnowPro Advanced Data Engineer topic 1 question 38 discussion

It should be option B

https://docs.snowflake.com/en/user-guide/data-load-considerations-prepare

Various tools can aggregate and batch data files. One convenient option is Amazon Kinesis Firehose. Firehose allows defining both the desired file size, called the buffer size, and the wait interval after which a new file is sent (to cloud storage in this case), called the buffer interval. For more information, see the Kinesis Firehose documentation. If your source application typically accumulates enough data within a minute to populate files larger than the recommended maximum for optimal parallel processing, you could decrease the buffer size to trigger delivery of smaller files. Keeping the buffer interval setting at 60 seconds (the minimum value) helps avoid creating too many files or increasing latency.