Correct Answer: A

Rationale: Clinical reasoning involves deliberate and thoughtful decision-making, considering alternatives, and using both formal and informal data gathering methods to provide optimum care.

Correct Answer: B

Rationale: The correct answer is B: 'Occurs after a streptococcal infection.' Acute postinfectious glomerulonephritis often occurs after an infection with certain strains of streptococcus bacteria, specifically group A streptococcus. The body's immune response to the infection leads to inflammation and damage in the kidneys. Choices A, C, and D are incorrect because acute postinfectious glomerulonephritis is primarily associated with streptococcal infections, not urinary tract infections, renal vascular disorders, or E. coli.

Correct Answer: B

Rationale: Azotemia (elevated BUN and creatinine) and oliguria (reduced urine output) are classic signs of renal failure, indicating impaired kidney function. In renal failure, the kidneys are unable to effectively filter waste products, leading to an increase in BUN and creatinine levels in the blood. Additionally, oliguria occurs due to decreased kidney function. Increased GFR (Choice C) is not expected in renal failure as it signifies improved kidney function, which is not the case in renal failure. Polyuria and elevated creatinine clearance (Choice D) are not typical findings in renal failure. Polyuria is more commonly associated with conditions like diabetes insipidus, while elevated creatinine clearance would indicate increased kidney function, which is contrary to the impaired function seen in renal failure.

Correct Answer: C

Rationale: Healthy People 2020 focuses on decreasing tobacco use, improving immunization rates, and increasing access to healthcare among its leading health indicators.

Correct Answer: C

Rationale: The NCAST Feeding Scale is the most suitable tool to evaluate maternal and newborn attachment behaviors during feedings. It focuses on observing the interaction between the parent and infant, providing insights into their bonding. The Apgar score is used to assess a neonate's immediate transition to life outside the womb, not specifically maternal and newborn attachment behaviors. The Ballard scale is used to estimate gestational age, not to assess attachment behaviors. The Brazelton Neonatal Behavioral Assessment Scale is designed to evaluate a newborn's responses to various stimuli, not specifically maternal and newborn attachment behaviors.