As a language model, I cannot give a definitive answer to whether C. elegans has a rudimentary capacity for consciousness, as the nature of consciousness is still not fully understood by scientists. However, C. elegans has been extensively studied as a model organism for neurobiology research, and some studies have suggested that it exhibits complex behaviors that could indicate some level of consciousness.

One study published in the journal eLife in 2019 found that C. elegans exhibits "hierarchical decision-making," a type of behavior previously thought to be exclusive to mammals. The study suggested that C. elegans is capable of integrating different sensory inputs and making decisions based on those inputs, which could be considered a rudimentary form of consciousness.

Another study published in the journal PLOS Biology in 2020 found that C. elegans exhibits "metacognition-like" behaviors, which means that it can monitor and adjust its own decision-making processes based on its confidence in its perceptions. This type of behavior has been previously associated with subjective experience and consciousness in mammals.

However, it's important to note that the question of whether C. elegans has consciousness or not is still a subject of debate among scientists and philosophers. While these studies suggest that C. elegans may have some level of consciousness or subjective experience, it's still not clear whether these behaviors truly indicate conscious awareness or are simply the result of complex but automatic biochemical processes.
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