Qualified food vendors should have measures in place to prevent cross contamination during food transportation. true or false?

It is true if they didn't have the safety measure consumers could get sick.

It is true because if they didn't have measures in place to prevent cross contamination during food transportation then the consumers would get sick.

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.