In a 30 degree bank turn, what will happen if you release the stick while hand-flying in normal law?

In a 30 degree bank turn while flying in normal law, if the stick is released, the airplane is designed to maintain its current bank angle due to the stability characteristics inherent in its flight control laws. This means that if you set a bank angle of 30 degrees and then let go of the control stick, the airplane will not roll further nor will it return to straight flight automatically—rather, it will stay in that 30 degree bank.

The reason behind this is that in normal law, the aircraft's flight control system can automatically manage certain flight parameters to maintain controlled flight, including pitch, bank, and load factor. This stability allows pilots to focus on other aspects of flying without needing to constantly adjust control inputs to maintain a turn.

In terms of the other choices, they would suggest changes in the bank angle which would not happen in this scenario when the controls are released under normal flight law. The aircraft is engineered to provide stability and reduce pilot workload, effectively allowing for the current flight conditions to be sustained automatically until further pilot input is made.