Writing & Language
Since its heyday in the 1940s and 1950s, action painting has become closely associated with Jackson Pollock, the abstract expressionist painter who began experimenting with this technique after taking his canvas off the easel and laying it down on the floor. According to Pollock, maneuvering around the canvas on the floor allowed him to get lost in the painting. Photographer Hans Namuth, who once had the possibility to observe Pollock's action painting, described it as dancing. He said Pollock gradually picked up speed as he circled the canvas, flinging black, white, and rust-colored paint off his brush until the canvas was covered, a tangle of splashes and splatters and drips.
Choice C is the best answer because "opportunity" is the most contextually appropriate way to indicate that circumstances allowed Namuth to observe Pollock.