The phrase "complex choice" is correct and usable in written English.
It is often used in the context of decisions that require careful consideration due to the number of factors that need to be weighed. For example, "Emily had a complex choice to make about whether to pursue a graduate degree or stay in her current job."
But how much aid and protection a society should provide, given the costs, is ultimately a complex choice for democracies.
Though he spent a lifetime proving the fundamental weakness of human beings in predicting the outcomes of any relatively complex choice, it happily didn't stop him making all sorts of errors of judgment in his own life.
Tehran's missiles and nuke development are at the top of Chinese news broadcasts this week, and the tone of the coverage suggests that Chinese leaders are facing a more complex choice than in the past.
Pity the nervous international traveller, switching tickets last minute for a less complex choice of destination, especially when news reports seem to suggest that the whole of the UK has been set alight.
Dr. Quill believes this is a "more morally complex" choice because over the last decade the practice has expanded beyond those with end-stage cancer or Alzheimer's disease — who often lose interest in food or forget how to eat and drink — to people who are not "actively dying" but nevertheless have had enough of disability or dependence.
Respondents completed a complex choice experiment and appeared to trade between outreach service attributes.
Inevitably, then, there are some complex choices here.
But in weighing the future of Blockbuster, they face particularly complex choices.
It stems from complex choices made in recognising billions of dollars of losses on derivatives.
It is why referendums that scrunch complex choices into binary propositions generate as much conflict as they resolve.
It also underscores the difficult and complex choices state and local governments face in pursuing clean-energy goals.
