Choose the correct alternative which will improve the part of the sentence given in quotes:
Captain Ranjith 'safety navigated' his ship without an accident for 100 voyages.

Correct option is C

The correct option is (c) Safely navigated.
Error identification: "Safety" is a noun, but here we need an adverb, so "safely" should be used.
Grammatical Rule used: Adverbs modify verbs to show how something is done.
Corrected sentence: Captain Ranjith safely navigated his ship without an accident for 100 voyages.
Example: He safely landed the plane during a storm.
Meanings of other options:
Safely navigate: Incorrect tense.
Safety navigates: Incorrect as it uses the noun form.
No improvement: Not applicable.