Which of the Following Statements Is True About the Significance

Which of the following statements is true about the significance of numbers?

A) Zeros between non-zero digits are not considered significant.
B) All digits of a number are significant, though their relative importance vary.
C) Zeros at the end of a number without a decimal point are significant.
D) Leading zeroes serve only to put the significant digits in the correct positions.
E) Zeros at the end of any number with a decimal point are significant.