Which of the following statements is false?

a) Set and Get methods can validate attempts to modify private data and control how that
data is presented to the caller, respectively.
b) If an instance variable were public, any client of the class could see the data and
modify it, including setting it to an invalid value.
c) public data allows client-code programmers to write code that depends on the class’s
data format. If the class’s owner changes that format, any client code dependent on it
would “break” and would need to be adjusted to the new format, making it subject to
break again.
d) All of the above are true.

d) All of the above are true.