The correct answers are A, B, and C .

The original variable name appears to contain a typing error. The variable should be used consistently as sampleText:

let sampleText = " The quick brown fox jumps " ;

A is correct because includes() checks whether a string contains a specific substring and returns a Boolean value:

sampleText.includes( ' fox ' );

Since " fox " exists inside " The quick brown fox jumps " , this returns:

true

B is correct after correcting the typing error. The correct expression is:

sampleText.indexOf( ' quick ' ) > -1;

indexOf() returns the index position where the substring is found. If the substring is not found, it returns -1.

Since " quick " exists in the string, sampleText.indexOf( ' quick ' ) returns a value greater than -1, so the expression returns:

true

C is correct after correcting the missing quotation marks and adding a Boolean comparison:

sampleText.indexOf( ' fox ' ) !== -1;

The substring " fox " exists in the string, so indexOf( ' fox ' ) does not return -1. Therefore, the expression returns:

true

D is incorrect because the method name is typed incorrectly. JavaScript string has includes(), not include().

Incorrect:

sampleText.include( ' fox ' )

Correct:

sampleText.includes( ' fox ' )

E is incorrect because JavaScript string matching is case-sensitive:

sampleText.indexOf( ' Quick ' ) !== -1;

The string contains " quick " with a lowercase q, not " Quick " with an uppercase Q, so this returns:

false

Therefore, the verified answers are A, B, and C .