You are answering a USMLE-style medical question. Question: An immunology expert is delivering a talk on innate immunity. While talking about inflammasomes, he describes the process via an example: products of cellular stress are detected by NLRP3, which includes NOD-, LRR-, and pyrin domain-containing 3; the latter interacts with apoptosis-associated speck-like protein containing CARD (ASC) via the pyrin domain, which leads to the formation of a protein speck that consists of multimers of ASC dimers. Which of the following enzymes will be activated as the next step in the process? Options: A) Adenosine deaminase B) Caspase 1 C) Protein phosphatase D) Tyrosine kinase Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.