Final answer:
The correct answer is option A) Black.
Step-by-step explanation:
The color of ink used for signing performance evaluations can be based on organizational policies or personal preferences. In formal business contexts, black ink is often preferred because it is the most professional and is considered to be very legible when reproducing documents.
Some organizations might prefer blue ink as it clearly shows an original signature on the document, distinguishing from copies.
However, there is no universal rule dictating that a performance evaluation must be signed in a specific ink color unless stipulated by a specific entity's guidelines or industry standards.