Engel leases a commercial building to Nishi Whiskey, LLC (Nishi), giving Nishi an option to purchase the building for $250,000 in cash during the term of the lease. Misinterpreting the lease, Nishi attempts to exercise the option by tendering a mortgage to Engel for $250,000 (that is, Nishi mistakenly believes Engel will finance Nishis purchase). Engel refuses to accept the mortgage. Did Nishis bungled attempt to exercise the option terminate it? Explain.