The student wants to explain an advantage of the infilling technique. Which choice most effectively uses relevant information from the notes to accomplish this goal?
A
To remove carvings from sandstone arches in Utah’s Arches National Park, power grinding is not always feasible.
B
Filling in carvings with ground sandstone and a bonding agent is less invasive than smoothing them away with a power grinder, which can greatly alter or damage the sandstone arches.
C
Park rangers can use a power grinding technique to smooth away carvings or fill them in with ground sandstone and a bonding agent.
D
As methods for removing carvings from sandstone, power grinding and infilling differ in their level of invasiveness.
Explanation
Correct answer: B.
Choice B is the best answer. The sentence effectively explains an advantage of infilling: it’s less invasive than using a power grinder.
Why the other choices are wrong
Choice A
Choice A is incorrect. The sentence identifies a disadvantage of power grinding; it doesn’t explain an advantage of infilling.
Choice C
Choice C is incorrect. The sentence identifies the two techniques park rangers use; it doesn’t explain an advantage of infilling.
Choice D
Choice D is incorrect. The sentence indicates that power grinding and infilling are different in one aspect; it fails to explain an advantage of infilling.