Occasionally, a particular logic expression will be of no consequence in the operation of a circuit, such as in a BCD-to-decimal converter. These result in ________ terms in the K-map and can be treated as either ________ or ________, in order to ________ the resulting term.

• don't care, 1's, 0's, simplify
• spurious, AND's, OR's, eliminate
• duplicate, 1's, 0's, verify
• spurious, 1's, 0's, simplify