To solve this question, the user needs to have a basic understanding of the double data type in programming.

The double data type is used to represent decimal numbers with a higher degree of precision than the float data type. It is a 64-bit data type, which means it contains 64 bits of information.

The two parts of a value of type double are:

A. significant digits: This refers to the number of digits in the value that are considered to be accurate. The more significant digits a value has, the more precise it is.

B. exponent: This refers to the power of 10 that the value is multiplied by. The exponent allows for a wider range of values to be represented than would be possible with a fixed number of digits.

C. numerator: This is not a part of a value of type double. The numerator is used in fractions to represent the top part of the fraction.

D. denominator: This is also not a part of a value of type double. The denominator is used in fractions to represent the bottom part of the fraction.

Therefore, the correct answer is:

The Answer is: A