A) unreeling from a spool is the correct answer. The proper way to open a new coil of nylon line is to unravel it by unreeling it from the spool or coil, rather than the other methods listed. This helps prevent the line from becoming tangled or kinked, which can damage the line and make it more difficult to use. The other options, such as pulling the end up through the eye of the coil or uncoiling from the outside, can lead to twists and kinks in the line, compromising its strength and performance.