Which of the Following Statements Is NOT Part of the Rules

Which of the following statements is NOT part of the rules for determining significant figures?

A) Non-zero digits at the end of a number are not significant.
B) Zeroes between two numbers are significant.
C) Zeroes to the left of the first non-zero number are not significant.
D) Zeroes at the end of a number,but before a decimal are ambiguous.
E) All of the above statements are part of the rules.