In key signatures with sharps, the key is

A One half step up form the last sharp.
B The next to last sharp.
C One half step up from the last flat.
D One whole step up form the last sharp.

D One whole step up from the last sharp.

A One half step up from the last sharp.

The correct answer is D) One whole step up from the last sharp.

To determine the key in key signatures with sharps, you need to look at the last sharp in the key signature and then go up one whole step (two half steps). This rule applies to all key signatures with sharps.

Let's break down each option to understand why D) is the correct answer:

A) One half step up from the last sharp: This option is incorrect because going up only one half step would not bring you to the next key in the sharp key sequence.

B) The next to last sharp: This option is incorrect since the last sharp in the key signature is the one that determines the key, not the one before it.

C) One half step up from the last flat: This option is incorrect because it refers to key signatures with flats, not sharps.

D) One whole step up from the last sharp: This option is correct because it aligns with the rule of going up one whole step from the last sharp in the key signature.

Remember, to determine the key in key signatures with sharps, you need to identify the last sharp and then go up one whole step from there.