डेस्कटॉप डेटाबेस की तुलना में 'सर्वर-डेटाबेस' का एक विशिष्ट प्राथमिक लाभ निम्नलिखित में से कौन सा है?

In an indexed database for historical stock quotes, a B-tree is used as the index structure to support range scans efficiently on disk, with each internal node holding multiple keys and child pointers. The branching factor ensures logarithmic height even for large datasets, making search, insert, and delete operations balanced at:

Which indexing technique is best suited for low-cardinality columns (such as Gender or Status) in a data warehouse fact table?