fix(curriculum): updated comprehension check questions for string concatenation lecture (#58742)

curriculum/challenges/english/25-front-end-development/lecture-introduction-to-javascript/672d49b2fb76df5f1d6117af.md

@@ -124,47 +124,47 @@ Think about how you combine text in JavaScript.
 
 ## --text--
 
-Which of the following code examples uses the `+=` operator correctly for string concatenation?
+Which of the following is the correct way to concatenate strings?
 
 ## --answers--
 
 ```js
-let greeting = 'Hi';
-greeting = greeting + ' there!';
+let greeting = "Hi";
+greeting -= " there!";
 ```
 
 ### --feedback--
 
-Look for the option that appends text to an existing string.
+Refer to the middle of the video where this was discussed.
 
 ---
 
 ```js
-let greeting = 'Hi';
-greeting =+ ' there!';
+let greeting = "Hi";
+greeting =+ " there!";
 ```
 
 ### --feedback--
 
-Look for the option that appends text to an existing string.
+Refer to the middle of the video where this was discussed.
 
 ---
 
 ```js
-let greeting = 'Hi';
-greeting += ' there!';
+let greeting = "Hi";
+greeting += " there!";
 ```
 
 ---
 
 ```js
-let greeting = 'Hi';
-greeting == ' there!';
+let greeting = "Hi";
+greeting == " there!";
 ```
 
 ### --feedback--
 
-Look for the option that appends text to an existing string.
+Refer to the middle of the video where this was discussed.
 
 ## --video-solution--
 
@@ -172,41 +172,36 @@ Look for the option that appends text to an existing string.
 
 ## --text--
 
-What will be the output of the following code?
+Which of the following is the correct method to concatenate multiple strings?
 
-```js
-let str1 = "Hello";
-let str2 = "World";
-let result = str1.concat(", ", str2, "!");
-```
 
 ## --answers--
 
-`"HelloWorld!"`
+`concatenate()`
 
 ### --feedback--
 
-Consider how the concat() method works with strings and multiple arguments.
+Refer to the end of the video where this was discussed.
 
 ---
 
-`"Hello, World!"`
+`concat()`
 
 ---
 
-`"Hello, World !"`
+`concatenating()`
 
 ### --feedback--
 
-Consider how the `concat()` method works with strings and multiple arguments.
+Refer to the end of the video where this was discussed.
 
 ---
 
-`"Hello World!"`
+`concats()`
 
 ### --feedback--
 
-Consider how the `concat()` method works with strings and multiple arguments.
+Refer to the end of the video where this was discussed.
 
 ## --video-solution--