What does the 'GLC' command primarily show in Bloomberg?

The 'GLC' command in Bloomberg primarily shows global commodities prices. This command is a valuable tool for users interested in tracking and analyzing commodity markets, as it provides comprehensive information regarding price movements, trends, and historical data across various commodities globally. The focus on commodities allows users to make informed decisions based on real-time market conditions.

The other options do not align with the functionality of the 'GLC' command. General ledger controls, gross liquidity changes, and global loan comparisons pertain to different financial concepts and data entirely, making them irrelevant in the context of this command. Hence, the correct understanding revolves around the emphasis on global commodities pricing data that 'GLC' facilitates.