The Difference Between {N} and {N,} Is

Multiple Choice

The difference between {n} and {n,} is:

A) {n} matches at least n occurrences,whereas {n,} matches exactly n occurrences
B) {n} matches exactly n occurrences,whereas {n,} matches at least n occurrences
C) {n} and {n,} match exactly n occurrences
D) {n,} generates a syntax error