Final answer:
Rayon-polyester running pants are a safety hazard while soldering due to their potential to melt or catch fire at high temperatures. Safer clothing options are those made from natural fibers like cotton or leather, and wearing safety gear like leather gloves and safety goggles is also recommended.
Step-by-step explanation:
Among the listed articles of clothing, the rayon-polyester running pants are a potential safety hazard when soldering. These materials can melt or ignite at high temperatures commonly encountered during soldering operations. A safer option would be to wear clothing made from natural fibers like cotton or leather which are more resistant to heat. When engaging in soldering, wearing non-flammable clothing, such as a heavy cotton shirt or denim blue jeans, and utilizing protective gear like leather gloves are best practices to minimize safety risks. It's also important to follow all safety protocols and use additional safety gear, such as safety goggles, to protect against sparks and intense light that can cause eye injuries.