Identifying Paradox and Oxymoron in Poetry

In examining the works of 20th-century poets, one can observe the effective use of paradox and oxymoron to convey intricate emotional landscapes. The author often utilizes these devices to juxtapose opposing ideas, creating profound moments of tension. Consider the following lines:
"The silence of the roaring crowd." This phrase intertwines contrasting concepts, allowing readers to explore underlying themes. Based on this example, identify which of the following options best represents an instance of both paradox and oxymoron.