Which statement about romanticism in the arts is true?
a. romantic art adopted the neoclassical traits of order and balance.
b. romantic art captured the power and beauty of nature on canvas.
c. romantic art appealed to the viewer's reason and the intellect.
d. romantic art used strict rules for form and content.

That would be:

b. Romantic art captured the power and beauty of nature on canvas.
Neoclassical art characteristics are about deduction and human beings and paid attention technicalities of literary such as diction and grammar.

This definition fits letters a, c and d.

 One of the Romantic period’s characteristics was the expression of strong senses, emotions, and feelings in literary, art and music. Romantics rejected the idea of deduction – the process of gaining knowledge by using logic or reason; rather, they believe that it is gained through intuition, the ‘gut feeling’ – knowing something through natural feeling as guidance without evidence. In turn, this period emphasizes more on exaggerated emotions of awe, apprehension, horror and terror which intensifies the subjective perspective of one’s experiences.

These definitions fit letter b.

featured traveling preachers that drew large audiences.

The First Great Awakening or the Evangelical Revival was a series of Christian revivals in the Thirteen colonies between the 1730s and the 1740s. This movement established Anglo-American evangelicalism as a movement within American Protestant Churches.

This was mostly distinguished by a new way of preaching the doctrine of Christianity. The preachers were able to gather enormous crowds. Preachers such as Whitefield, Tennent and Davenport travelled around the country, and their meetings were distinguished by the enthusiastic response of people. Attendants often became emotional and some even had mystical visions.