SAT English Practice Question

The first person to walk on the moon, Neil Armstrong, famously said, "That's one small step for man, one giant leap for mankind." However, recordings of Armstrong's transmission show that he actually said, "That's one small step for *a* man, one giant leap for mankind." What explains the discrepancy between Armstrong's spoken words and the transcript of his transmission?

1. A.a technical error in the recording equipment.
2. B.Armstrong’s attempt to correct a grammatical error.
3. C.Armstrong’s failure to clearly enunciate the word *a*.
4. D.a difference in the way the words were transcribed and spoken.