During strengthening heat treatment, the step traps the material in an unstable crystalline structure. a)-quenching, b)-tempering c)-solution treatment

A) Quenching

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as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper

there are no correct statementd on the list of choices you provided.