Final answer:
The best remedy for Tristan against the breaching seller is specific performance.
Step-by-step explanation:
The best remedy for Tristan against the breaching seller is A. specific performance.
Specific performance is a legal remedy where a court orders the breaching party to fulfill their contractual obligations as agreed. In this case, Tristan can seek a court order to compel the seller to transfer the title of the 2-acre lot.
Compensatory damages (option C) refers to monetary compensation for any losses suffered due to the breach. Volume seller damages (option B) and reformation (option D) are not applicable in this scenario.