This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Lyme disease is 
Select and explain. 
A. caused by Borrelia vincentii, B. transmitted by flea bite, C. diagnosed by demonstration of specific IgM antibody, D. the etiological agent can be grown in modified Kelley's medium
C: diagnosed by demonstration of specific IgM antibody
Answer: C: diagnosed by demonstration of specific IgM antibody 
Explanation: None