Which of the following reflects a correct legal principle?

• A. A, B, and C, are co-owners of a three-hectare orchard. If A decides to sell his share to B, C has a right of redemption.
• B. A and B are adjoining owners of a rural land. Each land has an area of half a hectare. If B sells his land to D who does not own any rural land, C has a right of redemption.
• C. If the right to repurchase is not exercised within the period agreed upon, a judicial order is necessary to consolidate ownership on the buyer.
• D. A contract of sale is not a mode of acquiring ownership.