Model reduction techniques aim to make deep learning models smaller and more efficient. A. Knowledge distillation: This technique involves training a smaller "student" model to reproduce the behavior of a larger, more complex "teacher" model. This effectively transfers the knowledge from the large model to a smaller one, leading to model size reduction. B. Low rank approximation: This method reduces the number of parameters in a model by approximating high-dimensional weight matrices with lower-rank matrices, thereby reducing computational complexity and memory footprint. C. Network pruning: This technique involves removing redundant or less important connections (weights) or even entire neurons/filters from a neural network, directly reducing the model's size and computational requirements. D. Federated data allocation: This refers to the distribution and management of data in a federated learning system, where models are trained on decentralized data. It is related to distributed learning paradigms, not a technique for reducing the size of a single model itself. The correct options are: A. Knowledge distillation B. Low rank approximation C. Network pruning