The correct option for the question given is (C) Talia puts in only 50 percent of effort during her workout.
Internal barrier differs from external barrier to working out in that the former comes from the individual, while the latter is more influenced by the environment, availability of exercise equipments, other people, and other external factors. The other options for the question all falls into the category for external barriers.
Caffeine is usually not dangerous when used carefully. Depressants are a group of drugs that slow down the activity in the brain and body. and coffee helps you stay awake.
