An urban planning committee recommends replacing several public parks with high-rise residential buildings to address a city's housing shortage, arguing that this will efficiently increase housing availability. This recommendation implicitly assumes which of the following?

The correct answer to the question "An urban planning committee recommends replacing several public parks with high-rise residential buildings to address a city's housing shortage, arguing that this will efficiently increase housing availability. This recommendation implicitly assumes which of the following?" is Option B: The land currently occupied by parks is the most suitable or only available option for new housing development..

The other options — A) The city's current residents universally prefer more housing over green spaces., C) The new residential buildings will be affordable for all income levels., D) The current housing shortage is solely due to insufficient physical structures. — are incorrect for this GMAT Exam Prep question. As explained above: The recommendation hinges on the unstated assumption that park land is the optimal or sole available resource for new housing, disregarding other potential sites or alternatives for development.