When the Price Of,say,a Package of Rice Changes,what Must the BLS

When the price of,say,a package of rice changes,what must the BLS do next?

A) immediately incorporate the new price into the CPI
B) determine if the new price is consistent with other price changes for the period
C) determine if the size,quality,weight,or packing of the rice has changed and adjust the price accordingly
D) ignore the price change
E) immediately incorporate the new price into the CPI only if the price has fallen