OG详解-OG6 文法 Q13

Choice A is the best answer. The sentence emphasizes Janaki Ammal’s achievement, explaining that she successfully created sugarcane hybrids that are well suited to India’s climate by crossbreeding an imported sugarcane species with grasses native to India.
Choice B is incorrect. The sentence emphasizes the goal of the Imperial Sugar Cane Institute in the 1930s; it doesn’t emphasize Janaki Ammal’s achievement. Choice C is incorrect. While the sentence mentions Ammal, it doesn’t emphasize her achievement of successfully creating sugarcane hybrids. Choice D is incorrect. While the sentence mentions the achievement of crossbreeding imported sugarcane species with grasses native to India, it doesn’t emphasize the achievement as belonging to Janaki Ammal.