The correct answers are A, B, and D .
The two variables are:
let str1 = ' Java ' ;
let str2 = ' Script ' ;
The goal is to combine them into:
JavaScript
Option A is correct because template literals can insert variables directly into a string:
`${str1}${str2}`
This becomes:
`${ ' Java ' }${ ' Script ' }`
Result:
JavaScript
Option B is correct because strings have a concat() method:
str1.concat(str2);
This joins str2 onto the end of str1.
Result:
JavaScript
Option D is correct because the + operator performs string concatenation when both operands are strings:
str1 + str2;
This becomes:
' Java ' + ' Script '
Result:
JavaScript
The incorrect options:
Option C is not valid JavaScript for joining strings. const is used for declaring constants, not concatenating values.
Option E is incorrect because join() is an array method, not a string method. This would only work with an array, for example:
[ ' Java ' , ' Script ' ].join( ' ' );
But str1 is a string, so:
str1.join(str2)
is invalid.
Therefore, the verified answers are A, B, and D .