The hiking trail was clearly marked at its beginning, but signs became increasingly _______ as we climbed higher. Eventually, we had to rely entirely on GPS navigation to find our way.
Which choice completes the text with the most logical and precise word or phrase?
abundant
bright
visible
scarce
Correct Answer: D
Choice D is the best answer. The passage contrasts "clearly marked" beginning with needing GPS later, indicating signs became less frequent. "Scarce" means rare or in short supply, fitting this decrease.
Choice A is incorrect because "abundant" would mean more signs, contradicting the need for GPS. Choice B is incorrect because "bright" refers to lighting, not frequency. Choice C is incorrect because "visible" contradicts needing alternative navigation.