Question

when using a probe thermometer, why should the probe end never touch the bone or container?
the bone or container will be cooler than the food and result in a false reading
the bone or container will be hotter than the food and result in a false reading
a food handler can contaminate food this way
all of the above

Explanation:

When using a probe thermometer, if the probe touches the bone or container, it can lead to false readings (either hotter or cooler than the actual food temperature). Also, a food handler touching with hands can contaminate food. So all the given reasons are valid.

Answer:

All of the above