What is NOT contained in the locale setting of the operating system?

A.
currency symbol

B.
language

C.
timezone

D.
thousands separator

Explanation:
From the man pages:
These environment variables affect each locale categories for all locale-aware programs:
LC_CTYPE Character classification and case conversion.
LC_COLLATE Collation order.
LC_TIME Date and time formats.
LC_NUMERIC Non-monetary numeric formats.
LC_MONETARY Monetary formats.
LC_MESSAGES Formats of informative and diagnostic messages and interactive responses.
LC_PAPER Paper size.
LC_NAME Name formats.
LC_ADDRESS Address formats and location information.
LC_TELEPHONE Telephone number formats.
LC_MEASUREMENT Measurement units (Metric or Other).
LC_IDENTIFICATION Metadata about the locale information.

Timezone is not handled by locale.