Correct option is A
The given highlighted phrase is incorrect because preposition ‘into’ is incorrect here and it should be ‘in’ because ‘in’ indicates the position of something while the preposition ‘into’ indicates an action or movement. Modal verb ‘may’ always takes base form of the verb with it so use of ‘change’ is correct. ‘Nothing much’ is correct here as it means ‘not a great amount; nothing of importance.’