The following sentence has been split into four segments. Identify the segment that contains a grammatical error.
(A) The friends excited planned their upcoming vacation, / (B) researching destinations / (C) and creating an itinerary filled with / (D) thrilling activities and adventures.

Correct option is B

Option (b) contains an error.
Explanation: The adjective "excited" should be an adverb to modify the verb “planned”. Correct usage: “The friends excitedly planned...”
Grammatical rule used: When modifying a verb, use an adverb, not an adjective.
Example: She quickly finished the work. ✅
Incorrect: She quick finished the work. ❌
�� Information Booster: Adverbs describe how something is done and usually end in -ly when derived from adjectives.