正解:C
The correct answer is C. At the beginning of each month .
A Snowflake resource monitor tracks credit usage for an account or specific warehouses. Resource monitors can have reset frequencies such as daily, weekly, monthly, yearly, or never. By default, the reset frequency is monthly.
Why C is correct:
With the default monthly frequency, the resource monitor's credit usage resets to 0 at the beginning of each monthly interval.
Why the other options are incorrect:
A). Daily reset can be configured, but it is not the default.
B). Weekly reset can be configured, but it is not the default.
D). Yearly reset can be configured, but it is not the default.
Official Snowflake documentation reference:
Snowflake documentation explains that resource monitors support configurable reset frequencies and that the default frequency is monthly.
Reference: Snowflake Documentation - Resource monitors; Snowflake Documentation - Credit quota and monitor frequency; SnowPro Core Study Guide - Snowflake Account and Resource Management.