All About Animals Has Two Product Lines: Cat Food and Dog

All About Animals has two product lines: Cat food and Dog food. Contribution margin income statement data for the most recent year follow: Assuming total fixed costs remain unchanged, how would discontinuing the Dog food line affect operating income?

A) Increase in total operating income of $33,000
B) Increase in total operating income of $159,000
C) Decrease in total operating income of $45,000
D) Decrease in total operating income of $111,000