plump for ~

思わぬ方法で腫瘍を消し去れる日が将来実現するかもしれません。

Treating cancer with radioactive bacteria

Three wrongs make a right

Dr Gravekamp and her colleagues therefore thought that their bacteria might be used to deliver anti-cancer agents specifically to tumours. At first, they considered using drugs. But on the advice of Ekaterina Dadachova, a radiologist and one of the paper’s authors, they eventually plumped for attaching a radioactive isotope of rhenium to their bugs.

www.economist.com/news/science-and-technology/21576628-surprising-new-way-kill-tumours-three-wrongs-make-right

plumpと聞くと、私は「＜人など＞を太らせる」（『ジーニアス英和辞典　第３版』大修館）等の語義を思い浮かべるのですが、文中ではplump for~で、「（よく考えて）・・・を（慎重に）選ぶ｛に決める｝」（ibid）という意味になります。ODOを当たってみると ‘decide definitely in favour of (one of two or more possibilities)’と記載されており、注意深いニュアンスが窺えます。(Shou-VR*)