Which of the following sentences has (incorrect) subject-verb agreement?

Question

Is the answer B ?

a. The peninsula of Korea, which stretches into the sea some 600 miles, lies south of Manchuria.

b. To the east are the Japanese islands.

c. A nation that has been overrun by its larger and more powerful neighbors several times, Korea was split into two separate nations after the war of the early 1950s.

d. Since that time, South Korea's economy, which follows the capitalistic model and enjoys the opportunities that come with free enterprise systems, have been growing steadily.

Answer 1

d
The subject is South Korea's economy (singular nown), so the verb must be "has been", NOT "have been".

Answer 2

Thanks