which of the following could cause a change in demand in the market for antibacterial soap?

which of the following could cause a change in demand in the market for antibacterial soap? (as opposed to a change in the quantity demanded)

A.) A ban on Triclosan (an ingredient used in antibacterial soaps), forcing soap makers to use a more expensive ingredient

B.) An information campaign showing that antibacterial soap is ineffective

C.) An increase in the cost of the plastic bottles used as containers for antibacterial soap

D.) None of the above