The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
The ways in that the northern renaissance preserved Christian thinking was due to the combination of Humanistic ideas combined with the Christian teachings stemmed from the Protestant Reformation started in Germany with Martin Luther and whose ideas were expressed in his book "95 Theses."
After the successful period of the Italian Renaissance that began in Florence, Italy, the Northern Renaissance had its moment in countries such as Germany, France, Great Britain, Poland, and the Netherlands.