Magda promised to give Violetta $10,000 in July. Violetta asked for the promise to be in writing and under seal. The document was signed and sealed in the presence of witnesses. Sometime before July, the seal fell off. Magda refused to pay the money, stating that it was a gratuitous promise. How can Violetta prove that Magda intended to be legally bound by her promise? 

The testimony of the witnesses will state that they saw a seal placed beside the signature at the time the document was signed. 

The document is signed by the parties.

The document is signed by the witnesses. 

All of the above.