In 1979 lack of rain reduced India's rice production to about 41 million tons, nearly 25 percent less than those of the 1978 harvest.
less than those of the 1978 harvest
less than the 1978 harvest
less than 1978
fewer than 1978
fewer than that of India's 1978 harvest
(A) those 不可以能去指代 41 million tons, 否则后面就变成了 41 million tons of the 1978 harvest
(C) 比较的内容是 rice production in 1979 vs rice production IN 1978, 而不是1978 per se
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