The correct option is (d) Xcel
The explanation: SwabMate, Aqua-Trace™, and Clean-Trace™ are the single-shot system. SwabMate is from Celsis and Aqua-TraceTM, and Clean-TraceTM is from Biotrace. Celsius uses the SysteSURE™ and Biotrace uses the Uni-Lite® and Uni-Lite® Xcel.