Question

read this excerpt. choose the sentence that best summarizes why nasa does not use dogs or electronics to find bad smells. nasa could use dogs to test odors. dogs have a sense of smell that is 1,000 times stronger than a humans sense of smell. or nasa could use \electronic noses,\ which are smelling machines. but nasa prefers to have human testers. humans are more careful and make fewer mistakes. in addition to working for nasa, george aldrich has served as an odor contest judge for many years.

Explanation:

The text states that while dogs and electronic noses could be used for odor - testing, NASA prefers human testers because they are more careful and make fewer mistakes.

Answer:

NASA prefers human testers over dogs or electronics because humans are more careful and make fewer mistakes.