If Contract A tells Contract B to do something, and then Contract B tells Contract C to do something, whose address will Contract C always see as the very first sender?

When an External Owned Account (EOA), which is a user's wallet controlled by a private key, initiates a transaction on the blockchain, this EOA is considered the original transaction initiator. Inside any smart contract function that executes as part of this transaction, there are two important global variables related to the sender: `tx.origin` and `msg.sender`. `tx.origin` is a global variable that always represents the address of the External Owned Account (EOA) that initiated the entire transaction. This value remains constant throughout the entire transaction execution, regard....