Assume the state of Colorado bans the importation of romaine lettuce after a college student died from E. coli infection caused by the romaine lettuce. Romaine Leafs is a California company affected by the ban. The state of Colorado would most likely justify its ban on which of the following Constitutional law concepts?

a.Commerce Power
b.10th Amendment Police Power
c.Privileges and Immunities Clause
d.Taxing Power