To select an element by ID, JavaScript uses:

document.getElementById( " status " )

The ID must be passed without any selector prefixes (no dot, no hash).

Then, to update the text inside:

element.innerHTML = ' Completed ' ;

Why the others are wrong:

A uses " .status " which would match a CSS class, not an ID.

B incorrectly prepends #, which is used in CSS selectors but not in getElementById.

D attempts to use .Value with capital V, which is incorrect for DOM text; .value only applies to form elements.

Thus, option C is correct.

JavaScript Knowledge References (text-only)

getElementById takes a raw ID string with no prefixes.

innerHTML updates an element’s displayed HTML content.

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