After cutting a piece of tubing to be flared, you should __________.

Correct Answer: Option D — remove inside burrs with a reamer

Removing inside burrs with a reamer is critical after cutting tubing. Burrs can obstruct flow, cause turbulence, or damage the flaring tool and the sealing surface of the flare itself. A clean, smooth interior ensures a high-quality, leak-free connection when the flare is compressed against the fitting.