Select the most appropriate option to substitute the highlighted segment.
Kunal did not anticipate the need, so he did not carries his own water bottle.

Correct option is A

The correct substitution of the highlighted words is (a) so he did not carry his own.
Explanation: "Did not" is already in the past tense, so the main verb "carry" must be in base form (V1), not "carries" (V5). “Carries” is present simple 3rd person singular, and hence grammatically incorrect here.
Grammatical rule used:
When using "did not", the main verb should always be in base form.
Structure: Did + not + V1
Example: She did not bring her notebook.
Information Booster:
Incorrect: He did not goes.
Correct: He did not go.