单选题 Which of the following can be inferred about what sixteenth and seventeenth-century artists thought of watercolor painting in comparison to oil painting?

【正确答案】 D
【答案解析】[注释] 根据第三段第一句“15世纪佛兰德画家创作的油画导致了壁画的衰退,在以后的几个世纪中,水彩主要用于绘制初步的素描或作为学习工具”。