Why should surfaces that touch food be sanitized?

Which plan groups foods according to types and indicates how much of each type should be eaten daily for a healthy diet? a.mypyramid plan b.food guide pyramid plan c.dietary guidelines for americans d.dietary pyramid guidelines

What can friends provide to affect mental health positively? a)peer pressureb)challengesc)conflictd)companionship

Is it bad to have a headache all day long?