A half note x ___= a whole note. Answer choices are A. 2

B. 1/2
C. 4
D. 1

The correct answer is C. 4.

A half note is worth 2 beats, so multiplying it by 4 would give us a duration of 8 beats, which is equal to a whole note.

To find the value of the missing half note that makes a whole note, let's consider the options given.

A. 2
B. 1/2
C. 4
D. 1

In music theory, a half note represents half the duration of a whole note. So, to find the missing half note that would make a whole note, we need to find a value that is half of the whole note.

Looking at the options, we can eliminate options A, C, and D since they are not representing the idea of a half note.

Therefore, the correct answer is B. 1/2, which means that a half note is equal to 1/2 of a whole note.