Select the most appropriate option to substitute the highlighted segment.
There was a bell over the door that jingled whenever a customer entered.

Correct option is C

The correct substitution of the highlighted words is (c) No substitution.
Explanation: The original sentence is grammatically and contextually correct. "That jingled" is a defining relative clause referring to "bell," and "whenever a customer entered" correctly uses past tense for a habitual past action.
Grammatical rule used: A defining relative clause gives essential information and uses "that" or "which" for objects.
Example: I remember the bell that jingled every time the door opened.