Answer:
D) Wally wins; this agreement is too indefinite since it does not identify which 40 acres are to be sold.
Step-by-step explanation:
Since in the given situation, wally agrees to sell but here the identification of the land is not mentioned i.e. 40 acres and at the later time the wally refused to sold any land so here wally should wins as the agreement is not definite which type of the land should be sold so it becomes the agreement void
Hence, the correct option is d.