Which factor contributes most to climate change?

Correct Answer: B

Rationale: The burning of fossil fuels releases significant amounts of greenhouse gases into the atmosphere, which is the primary driver of climate change.

Correct Answer: D

Rationale: The major objective of therapy in cystic fibrosis (CF) is to promote the removal of secretions from the lungs. Chest physiotherapy, which involves postural drainage, vibration, and percussion, has been the mainstay of treatment for CF patients. This technique helps loosen and clear mucus from the airways, reducing the risk of lung infections and improving respiratory function. Aerobic exercise is also effective in clearing the airways and is an essential part of the treatment plan for CF patients. While prophylactic antibiotics may be used for early signs of infection, they are not the most effective treatment for CF. Nebulized bronchodilators do not provide long-term benefits for CF patients. Heart-lung transplant may be considered for some CF patients, but it is not a suitable option for most individuals due to various limitations and availability issues. Therefore, the most effective treatment for cystic fibrosis is

Correct Answer: C

Rationale: Digitalis is used for chronic heart failure and certain arrhythmias, but not during acute resuscitation efforts.

Correct Answer: C

Rationale: Behavioral insomnia involves resistance to bedtime routines.

Correct Answer: D

Rationale: The protest stage is common in hospitalized children experiencing separation anxiety, characterized by excessive crying and clinginess.