Which sentence has one or more adjectives, but no adverb?

a)
margaret was the very last to finish, yet felt triumphant.

b)
the blue dolphins gazed intently at her.

c)
by fourth grade, the five students had become true friends.

d)
the old shiny watch was still ticking.

comfortable

explanation:

one type of the adjectives is predicate adjective. a predicate adjective is an adjective which follows a linking verb and modifies or refers back to the main subject of that linking verb.

it usually is used just before the noun it modies.

here in this example:

'penguins seem comfortable in the coolest habitats', comfortable is the predicate adjective which follows the linking verb 'seem' and modifies the noun.

not sure maybe the subject closer to it or subject-verb agreement