Microbiology Human immunoglobulin A can be described by which of the following statements? A It is the predominant immunoglobulin in plasma B It exists in four subclasses, of which IgA 2 is predominant C It can prevent attachment of microorganisms to epithelial cell membranes D It is prominent early in the immune response and is the major class of antibody in cold agglutinins 💡 Explanation Human immunoglobulin A can be described by which of the following statements? ✓ Correct Answer: C. It can prevent attachment of microorganisms to epithelial cell membranes