Gram-positive slightly elongated diplococci with mildly tapered opposite ends have been detected in the sputum of a patient with suspected pneumonia. What microorganisms have been detected in this case?

• A. Neisseria meningitidis
• B. Klebsiella pneumoniae
• C. Staphylococcus aureus
• D. Neisseria gonorrhoeae
• E. Streptococcus pneumoniae