"at risk" and "in jeopardy" are the only reasonable choices. The Oxford Learner's Dictionaries are excellent and include extra information that is useful to English learners. risk https://www.oxfordlearnersdictionaries.com/definition/english/risk_1?q=risk Idioms at risk (from/of something) ​ in danger of something unpleasant or harmful happening As with all diseases, certain groups will be more at risk than others. If we go to war, innocent lives will be put at risk. jeopardy https://www.oxfordlearnersdictionaries.com/definition/english/jeopardy_1?q=jeopardy Idioms in jeopardy ​in a dangerous position or situation and likely to be lost or harmed The civil war has put thousands of lives in jeopardy. The future of the school and 50 jobs are in jeopardy. Thousands of jobs could be in jeopardy.