English Language · English
Which choice completes the text so that it conforms to the conventions of Standard English? A study led by scientist Rebecca Kirby at the University of Wisconsin–Madison found that black bears that eat human food before hibernation have increased levels of a rare carbon isotope, ______ due to the higher 13 C levels in corn and cane sugar. Bears with these elevated levels were also found to have much shorter hibernation periods on average.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1carbon-13 ( 13 C),✓
- 2carbon-13, ( 13 C),
- 3carbon-13 ( 13 C)
- 4carbon-13, ( 13 C)
Correct answer
carbon-13 ( 13 C),
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