Nancy bought two beautiful hand-painted platters during a recent trip to mexico. she should have these dishes tested for which contaminant before using them to serve food

She should have these dishes tested for lead before using them to serve food.

The person who hand-painted these dishes may have used lead paint, which is a type of paint that contains lead, which is a common contaminant. If she doesn't want to get poisoned by lead, she should check whether these dishes are contaminated before eating from them.