C++ multiple choice help

(1) Select the false statement about the << operator.

a. Its buffer can be flushed by either endl or flush.

b. It returns a reference to itself.

c. It can be cascaded.

d. It is overloaded.

(2) Which of the following is not true about the statement: while(cin>>data)

a. The while loop will end when end-of-file is detected.

b. The stream is implicity converted to a pointer of type void*

c. The stream ignores whitespace (blank, tab, ect,) characters.

d. The >> operator must be explicitly defined to be overloaded for the loop to work properly.