Answer :
He used religious ideas to study nature and its laws
The option D is true, as Thomas Aquinas used religious ideas to study nature and its laws, and this made Thomas Aquinas a humanist.
Who was Thomas Aquinas?
Thomas Aquinas was an Italian Dominican theologian Saint. He was one of the most influential medieval thinkers of Scholasticism and the father of the Thomistic school of theology.
His philosophical and theological writings spanned a wide spectrum of topics, including commentaries on the Bible and discussions of Aristotle's writings on natural philosophy.
The influence of Saint Thomas Aquinas's writing has been so great, in fact, that an estimated 6,000 commentaries on his work exist to date.
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