Answer: D. The neighbor, because obtaining financing was a condition precedent.
Step-by-step explanation:
Even though it wasn't listed in the written contract, there was the condition precedent that the contract would not be binding unless funding was obtained. Condition precedent is a condition that must happen for a contract to become enforceable.
Funding was not obtained so the contract cannot be enforced. The neighbor would therefore prevail so long as the owner admits that there was indeed a condition precedent.