Which sentence does not contain any punctuation errors?
a."is the song "you're a grand old flag" traditionally sung on independence day? " john wondered.
b."you're a grand old flag' has such an upbeat melody," john observed.
c."i've always loved the patriotic song 'you're a grand old flag,'" john said.
d."could we perform 'you're a grand old flag at the concert? " john asked.

ye

explanation:

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.