Assuming Jack and Jill Own Land as Joint Tenants,which of the Following

Assuming Jack and Jill own land as joint tenants,which of the following statements is correct?

A) If Jill dies before Jack,Jack would be entitled to purchase Jill's interest in the land at valuation.
B) If Jack dies before Jill leaving no will,his interest in the land would be distributed according to the law of intestacy.
C) If Jack dies before Jill,his interest in the land would pass to Jill,the survivor.
D) If Jill dies before Jack,her interest would be distributed according to her will.