GMAT Sentence Correction (SC) | The health benefits of tea have been the subject of much

The health benefits of tea have been the subject of muchresearch; in addition to its possibilities for preventing and inhibiting some forms of cancer, the brewed leaves of Camellia sinensis may also play a role in reducing the risk of heart disease and stroke.

Here its refers to The brewed Leaves, which is plural - Wrong.
This clears - A, B and C

A. in addition toits possibilities for preventing and inhibiting
B. in addition toits possibilities to prevent or inhibit
C. besides the possibility
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