Match the following Regular Expression Character classes with their class descriptions:
1) [:alnum:] a) match all control characters
2) [:alpha:] b) match all printable characters (not including space) 3) [:graph:] c) match all letters
and digits 4) [:print:] d) match all letters 5) [:cntrl:] e) match all printable characters
A.
1-d, 2-c, 3-b, 4-e, 5-a
B.
1-c, 2-d, 3-e, 4-a, 5-b
C.
1-d, 2-c, 3-e, 4-b, 5-a
D.
1-c, 2-d, 3-b, 4-e, 5-a