Loren files a suit against Mabel, alleging a failure to pay for the harvest of Mabel's orchards. Mabel denies Loren's charge and claims that Loren breached their contract to harvest a certain number of acres and owes Mabel money for the breach. Mabel's claim is:_______

a. a contrary charge.
b. a counterclaim.
c. a counterpoint.
d. a cross complaint.