In regular expressions, three quantifier operators are
A) (), [] and {}
B) (),. and *
C) (), * and ?
D) *, ? and +

Question

Quizplus · Accepted Answer

The three quantifier operators in regular expressions are *, ?, and +. 
* - Matches zero or more occurrences of the preceding expression.
? - Matches zero or one occurrence of the preceding expression.
+ - Matches one or more occurrences of the preceding expression. 
Therefore, option D is the correct answer.

In Regular Expressions, Three Quantifier Operators Are