Which metacharacter is used to specify optional characters in a regular expression in Ruby?

What does the =~ operator do in Ruby when used with regular expressions?

A. Evaluates the regular expression

B. Compares two regular expressions

C. Matches a string against a regular expression

D. Assigns a regular expression to a string

Which method is used to find the first occurrence of a pattern in a string in Ruby?

A. String#search

B. String#find

C. String#find_pattern

D. String#match

What does the /\A anchor represent in a regular expression in Ruby?

A. Matches one or more occurrences of the previous character

B. Matches any character except a newline

C. Matches the start of a string

D. Matches the end of a string

What is the purpose of the + quantifier in a regular expression in Ruby?

A. Matches zero or one occurrence of the preceding character

B. Matches zero or more occurrences of the preceding character

C. Matches exactly n occurrences of the preceding character

D. Matches one or more occurrences of the preceding character