headlinese - 'Nirmala questions rich nations' - what does questions mean in this context?

Please look at the following

Source: http://www.thehindu.com/todays-paper/tp-international/nirmala-questions-rich-nations/article8545194.ece

Nirmala questions rich nations.

This is a headline of an article from a newspaper, the link to the article I have quoted.

After reading the article, I didn't understand how "questions" is used. I want to know in what sense question is being used. Does it mean she expressed doubts?