Mrs. Smith is a 75 year old female with a PMHx of breast CA, COPD, alcoholism and liver cirrhosis. She was admitted to your ICU with a high fever and diagnosis of SOB. Her CXR revealed a primary lobar pneumonia. For the past 2 days her sputum has had a "red currant jelly" appearance. Her sputum culture is still being processed in the lab. Based on her PMHx and her current symptomology, what pathogen do you suspect?

A) Escherichia coli
B) Klebsiella pneumoniae
C) Enterobacter cloacae
D) Serratia marcescens