How do you join strings in PHP?Question 14Select one:a.$m = “aa” + “bb”;b.$m = “aa” join “bb”;c.$m = “aa”.”bb”;d.$m = join(“aa”,”bb”);

To join strings in PHP, you can use the concatenation operator (.) or the join() function.

Option a: $m = "aa" + "bb"; This is incorrect because the + operator is used for arithmetic operations, not for joining strings.

Option b: $m = "aa" join "bb"; This is incorrect because the join() function in PHP requires an array as its first argument, not individual strings.

Option c: $m = "aa"."bb"; This is the correct way to join strings in PHP using the concatenation operator (.). The resulting value of$m will be "aabb".

Option d: $m = join("aa","bb"); This is incorrect because the join() function in PHP requires an array as its first argument, not individual strings.

Therefore, the correct answer is c. $m = "aa"."bb";