Which of the following statements is false?

a. A floating-point number is a number with a decimal point.
b. Java provides two primitive types for storing floating-point numbers in memory—float and double.
c. Variables of type float represent single-precision floating-point numbers and have seven significant digits.
d. Variables of type double represent double-precision floating-point numbers; these require twice as much memory as float variables and provide 14 significant digits.

d. Variables of type double represent double-precision floating-point numbers; these require twice as much memory as float variables and provide 14 significant digits.