What are pollinators?

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问题 What are pollinators?
  
Rowers are known to employ all manner of trickery to attract pollinators, from taking the shape of an insect mate to emitting wafts of rotting flesh. A South African flower lures in its main pollinators, Desmometopa flies, with the scent of a fresh meal. The flower produces a cocktail of chemicals that mimics those released by a wounded honey bee, drawing flies into a pollen-coated chamber.
Alison began her career in the mid-2000 s, right when medical researchers started to recognize that all tumors and cancers are genetically and biologically distinct. In other words, two women with breast cancer might have two different types of cancer with little in common other than that they both occur in the breast.

选项 A、Cancers and tumors.
B、Breast cancer.
C、Genetic engineering.
D、Biological engineering.

答案A

解析 文中的第二句话是对第一句话的具体说明,说明同一种乳腺癌,除了位置都是在乳腺这个部位,其余的病症均不相同。由此可以推断出选项A更为全面。
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