Parts of the following sentence have been given as options. Select the option that contains a grammatical error.
The jury was not happy with the performance and was quite harsh. The singer took their criticism in heart.

Correct option is C

The correct option is (c) their criticism in heart.
The phrase "in heart" is grammatically incorrect; the correct expression is "to heart." The corrected sentence should read: The singer took their criticism to heart. This means the singer took the criticism seriously and was affected by it.