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The answer is obviously president. President has the right to veto the bill, and has the power to sign the bill. As it has the power of congress sided in.
You can search for the vocabulary convert to your answers to governor. It is simple, but it is definitely not the governor, the state judiciary, the speaker of the house. MAYBE IT IS THE COMMITTEE CHAIR because the speaker of the house does not assign the role to the president.
Hence,
The answer is the OB.