Dress in black (A) several students from university took part (B) in a protest march in the city on Thursday as a part (C) of a campaign Against female infanticide (D) no error

The new law forbade the state banks not to (1)/ lend money to real estate, limited (2)/ their powers of discounting bills and securities, (3)/ and reduced the maximum of their paper currency. (4)   Error with explaination…?