|Question 2Verbal

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Though the thermoregulation mechanisms of fungi, such as _Amanita brunnescens_, have received little formal study, anecdotal evidence has suggested that fungal surface temperatures tend to be cooler than ambient temperatures. Experimental findings by Radamés Cordero et al. now ______ this idea: colonies of various fungi maintained temperatures below those at which they were incubated in a lab.
Which choice completes the text with the most logical and precise word or phrase?
obscure
A
corroborate
B
encapsulate
C
curtail
D