While mountain climbing and stamp collecting both require patience, _________ is certainly more physically demanding.
4
writingThe underlined pronoun makes the sentence ambiguous. Replace it with the choice that best reduces that ambiguity.
A
it
B
the sport
C
that one
D
climbing
Correct Answer: B
Choice B is the best answer. "The sport" clearly distinguishes mountain climbing from stamp collecting.
Choice A is incorrect because "it" is ambiguous and could refer to either activity. Choice C is incorrect because "that one" is vague. Choice D is incorrect because "climbing" is repetitive.