What is the purpose of using the yield from statement in generators?

The correct answer is Option B: To yield values from another generator.
The yield from statement in generators is used to delegate the generation of values to another generator. When a generator encounters yield from, it delegates the generation of values to another iterable (which could be another generator), and yields values from it one by one. This simplifies the syntax for delegating to sub-generators, making the code more readable and concise. Additionally, it allows for the propagation of exceptions raised by the sub-generator back to the main generator.