Suppose we have a smart contract that is able to exchange CT tokens for TT tokens and TT tokens for CT tokens. It is based on a constant product formula. The number of CT tokens times the number of TT tokens is always equal to 200. The current market price of a CT token is 5 ETH and the current market price of a TT token is 10 ETH.  To allow swaps, the contract is initially provide with 20 CT tokens and 10 TT tokens.  Note: This is a constant product AMM. If a trader sends 5 CT tokens to the contract, how many TT tokens should she expect in exchange? (We are not concerned with fees.)单项选择题

A

1

B

4

C

2

D

3

E

5

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