Final answer:
The revocation of the offer made by TTC to Wal-Mart would depend on the terms of the offer and when it was revoked.
Step-by-step explanation:
The revocation of the offer made by the Toy Company (TTC) to Wal-Mart would depend on the terms of the offer. If the offer stated that it would remain open for four months, then the revocation made after 100 days would be ineffective. This is because the offer was intended to remain open for the specified period. However, if TTC revoked the offer after 80 days, it would likely be effective since the four-month period would not have expired.