Hi, Kindly assist me on the right qn

Assume that Jordan was the registered proprietor of the fee simple estate in two picturesque plots of land in Perth called 'Whiteacre' & 'Greenacre'. 2 years ago, Jordan sold Greenacre to Sam. Last month, in return for a modest sum of money, Jordan agreed to the following terms drafted by Sam: 'Clause 2. Jordan, as the owner of Whiteacre, is hereby bound by a restrictive covenant maintain the gardens of Whiteacre for the benefit of Greenacre'. Based on these limited facts, pick the most correct option. O a. All of the other options are incorrect P. Clause 2 is unenforceable against Jordan because Clause 2 is not a 'restrictive covenant' (i.e., Clause 2 imposes on Jordan a positive obligation) O C. Clause 2 very likely creates a restrictive covenant O d. Clause 2 very likely creates an easement as defined in the common law