Question #N1111

The following is a passage from a novel written by an American author: As they wandered through the forest, the group noticed a group of birds that seemed to be following them.  The birds chirped and fluttered, and their playful antics seemed to be directed at the group.  The birds seemed to be amused by the group’s presence, and they continued to follow them.  The group found the birds’ behavior rather curious, but they continued their walk, and they continued to enjoy the beauty of the forest.  Which choice best revises the passage to maintain consistent verb tense?

Which choice best revises the underlined portion of the passage to maintain consistent verb tense?
A. The group found the birds’ behavior rather curious, but they continue to enjoy the beauty of the forest.
B. The group found the birds’ behavior rather curious, but they continued to enjoy the beauty of the forest.
C. The group found the birds’ behavior rather curious, but they had continued to enjoy the beauty of the forest.
D. The group found the birds’ behavior rather curious, but they had continued to enjoy the beauty of the forest.