Which of the following statement on flying buttress of Gothic architecture is not correct?

Gothic architecture could soar to great heights thanks to new techniques, such as pointed arches, ribbed vaulting and flying buttress.

Exposuretosustainednoisehasbeenclaimedto_____bloodpressureregulationinhumanbeingsand,particularly,toincreasehypertension,eventhoughsomeresearchershaveobtainedinconclusiveresultsthat_____therelationship. A: sharpen B: increase C: impairii. D: buttress E: obscure F: neutralize