UNESP 2016 – Questão 27

Linguagens / Inglês / Modal auxiliary verbs / Should: other uses
Genetically modified foods
 
Genetically modified (GM) foods are foods derived from organisms whose genetic material (DNA) has been modified in a way that does not occur naturally, e.g. through the introduction of a gene from a different organism. Currently available GM foods stem mostly from plants, but in the future foods derived from GM microorganisms or GM animals are likely to be introduced on the market. Most existing genetically modified crops have been developed to improve yield, through the introduction of resistance to plant diseases or of increased tolerance of herbicides. In the future, genetic modification could be aimed at altering the nutrient content of food, reducing its allergenic potential, or improving the efficiency of food production systems. All GM foods should be assessed before being allowed on the market. FAO/WHO Codex guidelines exist for risk analysis of GM food.
www.who.int

 
No trecho do segundo parágrafo "All GM foods should be assessed before being allowed on the market", o termo em destaque pode ser corretamente substituído, sem alteração de sentido, por:
a) could
b) has to
c) might
d) ought to
e) used to
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