Jean Is a Shareholder in Parrot Corporation, a Calendar Year

Jean is a shareholder in Parrot Corporation, a calendar year S corporation. During the year, Jean's share of the pass-through from Parrot is: ​
If Jean's basis in the Parrot stock was $100,000 at the beginning of the year, her basis at the end of the year is:

A) $45,000.
B) $55,000.
C) $65,000.
D) $95,000.
E) None of the above.