注意平行关系和句意，且主语是style
first, examine the split between 'more ergonomic' and just 'ergonomic'. in this case, we must preserve the meaning of the original statement: the new design is more ergonomic than the old design. if we change this to just 'ergonomic', we're attaching an implication that the old design simply wasn't ergonomic (and that the new design, by contrast, is) - an unacceptable implication. that gets rid of answer choices c, d, and e right there.
another item to examine is parallelism. in this case, in the construction 'X rather than Y' (or its analogues, 'X and not Y' and 'more X than Y'), items X and Y must be parallel.
A选项反而加强了argument，因为这些star cluster并不会因为重力太大而collapse，所以是有可能为dim star的
B选项难在选项看不懂 preclude=排除，抽主干看：A cluster of stats preclude the existence (phenomena observed at M87 center)，表示如果中间是星星的话，那么就观察不到这个中心的其他天文现象（例如附近的物体快速转动 - 个人浅见），所以给了一个和前提矛盾的描述）
The numerical effect is obvious: there are fewer salmon in degraded regions than in pristine ones; however, habitat loss also has the potential to reduce genetic diversity.
The boycott shut. down much of the City's foodstuffs marketing for two weeks, "riveting public attention on the issue of food prices"
错选D，那个应该是socialist的部份，women动机并没有提到这点
错选B，题目问的是socialist的commitment，不是women
正确选项D定位到这段：
For others, cost-of-living or organizing was valuable insofar as it led women into the struggle for suffrage, and similarly, the suffrage struggle was valuable insofar as it moved United States society one step closer to socialism
扫描二维码，直接登录
A选项有点绕，首先cost per pack to consumers其实就是company's sales price，所以表示公司不会为了牺牲利润而不涨价（公司一定会涨价）既然公司涨价了，那收到的香烟税就会变多