In paragraph three, how many ways are mentioned as the illustration of the fact that science students take advantage of computers

A．there is really no organically grown produce yet
B．some foods are falsely labeled
C．some states are slow in making laws concerned
D．each state should stop certifying certain foods

A．is being debated in the Congress
B．has come into effect
C．is in the charge of the US. Department of Agriculture
D．is delayed due to disagreement in Congress