Question #N177

The company’s new marketing campaign, which was supposed to increase sales, has actually had the opposite effect. The company’s profits have decreased, _and_ its stock price has fallen.

Which of the following correctly combines the two sentences?
A. The company’s new marketing campaign, which was supposed to increase sales, has actually had the opposite effect, its stock price has fallen.
B. The company’s new marketing campaign, which was supposed to increase sales, has actually had the opposite effect; its stock price has fallen.
C. The company’s new marketing campaign, which was supposed to increase sales, has actually had the opposite effect, and its stock price has fallen.
D. The company’s new marketing campaign, which was supposed to increase sales, has actually had the opposite effect, because its stock price has fallen.