Which of the following can lead to edema in right-sided heart failure?

In right-sided heart failure, the heart's ability to pump blood effectively is compromised, which leads to a backup of blood in the venous system. This backup results in increased systemic venous pressure. When venous pressure rises, it causes fluid to leak from the blood vessels into the surrounding tissues, ultimately leading to edema, particularly in the lower extremities and abdominal cavity.

Increased systemic venous pressure is a direct consequence of the heart's struggle to move blood forward effectively, causing fluid accumulation in tissues due to the higher hydrostatic pressure in the venous circulation. Therefore, this choice directly correlates with the physiological changes that occur in right-sided heart failure, making it the correct answer.