What was the impact of Mao Zedong's Great Leap Forward in China?

B. Mao's focus on rural steel production led to widespread famine and starvation.

Due to the immense focus of the rural population on producing steel, and environmental disasters (Great Chinese Famine, 1959-1961), the resulting consequence was failure to produce enough food to sustain the population (leading to widespread famine and starvation).

yup! you are correct it is b.

a. by accepting the election of president abraham lincoln in 1860 and convincing other southern states to do the same