When reading words using a Scanner object's next method, . a. any characters at the beginning of the input that are considered to be white space are consumed and become part of the word being read b. any characters that are considered to be white space within the word become part of the word c. the program must discard white space characters at the beginning of the input before calling the next method d. any characters at the beginning of the input that are considered to be white space are consumed and do not become part of the word being read