According to Snowflake documentation and the community discussion with upvoted comments, the maximum compute size for a serverless task is equivalent to an XXLARGE (2X-Large) user-managed virtual warehouse. The community discussion includes direct references to Snowflake documentation confirming this, with commenters providing specific documentation links and receiving upvotes for their accuracy. Option C (2X-Large) directly corresponds to the XXLARGE warehouse size mentioned in the documentation, while the other options represent smaller warehouse sizes that do not represent the maximum capacity for serverless tasks.