The Defendant, XYZ Pharmaceutical Company (Defendant), placed an advertisement in several newspapers on 20th Dec 2020, stating that its product, "The Magic Tablets", when used three times daily, for three weeks, would prevent cold and seasonal flu. The makers of The Magic Tablet additionally offered a $2000 reward to anyone who caught cold or flu after using the magic tablets, guaranteeing this reward by stating in their advertisement that they had deposited $2000 in the bank as a show of their sincerity. Ms. Liana (Plaintiff) bought a packet of Magic Tablets and used it as directed. After using the Magic Tablets, Ms. Liana caught flu & cold. So, Ms. Liana visited the office of XYZ to claim the reward - $2000 but the company refused to pay the reward by saying that it was not a contract but just an advertisement. Finally, Ms. Liana decided to sue the XYZ company.

Assume that you are a lawyer of Ms. Liana and discuss in detail with arguments that how this was a contract, and she can win this reward of $2000?