Which RAM type is typically more expensive due to its speed?

The choice of SRAM as the correct answer stems from its unique characteristics and performance advantages compared to other types of RAM. Static Random Access Memory (SRAM) is faster and performs better than Dynamic Random Access Memory (DRAM) because it does not require periodic refreshing to maintain data. This inherent speed advantage is crucial in applications where performance is paramount, such as cache memory in CPUs.

SRAM's architecture allows for quicker access times, which translates directly to its application in high-speed computing environments. This speed, along with the complexity of its design—SRAM cells use multiple transistors for each memory cell—contributes significantly to its higher production costs compared to DRAM, which is simpler and used primarily for bulk memory storage.

In broader terms, while types like DDR4 and SDRAM are faster than traditional DRAM, they still rely on the foundational structure of DRAM technology, making them less expensive than SRAM. Thus, while all options have their uses in specific contexts, SRAM remains more costly due to its performance capabilities and design complexity.