If you want, you can just remember that "on account of ___ing" can be eliminated. I can't think of any context in which that structure would work, so you should be able to rule it out safely.
"On account of" is followed by a noun, and is usually restricted to changes in abstract things (prices, emotions, etc.)
e.g., It's common for stock prices to fluctuate wildly on account of announcements made at press conferences.
C，an overwhelming proportion of women work, many of them in middle management and light industry
many of them 做women的同位语， in middle management and light industry作many的定语
同位语可以是一个句子，即同位语从句，也可以是modifier的一切形式，如名词/短语/直接引语/形容词等。
［这题选出答案并不难，但是分析有点复杂］
A选项：表达的意思错误，in spending的意思是两者在这方面是不一样的，默认了在其它方面是一样的，但实际上无法判断；同时，in its spending有点wordy
B选项：any错误，应该是any other，比较需要排除自己
C选项：✅unlike...可以当作插入语
D选项：错误同B
E选项：spending修饰any other insect，实际上应该修饰a species of midge
especially，专门地，如：I made it especially for you. 这是我特地为你做的。；尤其，格外，特别是，如：I love Rome, especially in the spring. 我喜爱罗马，尤其是春天的罗马。
specially，特别地，专门地，特意地，如：The ring was specially made for her. 这枚戒指是为她订做的。；特别是，如：I hate homework. Specially history. 我讨厌家庭作业，特别是历史。
二者都可以表示尤其是
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they may not think是插入语，可以省略不看
还原之后：make statements about an opponent that（）are true［that指代了statements］