Page 1008 - AP Computer Science A, 7th edition
P. 1008
18. (B) Objects in an array can be changed in a for-each loop by using mutator methods of the objects’ class. The changeStatus method, a mutator in the Book class, will work as intended in the given code. Choice C would be true if it were not given that each Book in bookList was initialized. If any given b had a value of null, then a NullPointerException would be thrown.
