题目选项分析

Airline: Newly developed collision-avoidance systems, although not fully tested to discover potential malfunctions, must be installed immediately in passenger planes. Their mechanical warnings enable pilots to avoid crashes. Pilots: Pilots will not fly in planes with collision-avoidance systems that are not fully tested. Malfunctioningsystems could mislead pilots, causing crashes.

The pilots' objection is most strengthened if which of the following is true?

【选项】Jet engines, although not fully tested when first put into use, have achieved exemplary performance and safety records.