Which of the Following Statements A), B) or C) Is

Which of the following statements a) , b) or c) is false?

A) String method count returns the number of times its argument occurs in the string on which the method is called.
B) If you specify as the second argument to method count a start_index, as in sentence.count('to', 12)
Count searches only the slice string[start_index:]-that is, from start_index through end of the string.
C) If you specify as the second and third arguments of method count the start_index and end_index, as in sentence.count('that', 12, 25)
Count searches only the slice string[start_index:end_index]-that is, from start_index up to, but not including, end_index.
D) All of the above statements are true.