On January 1st, Jack offers to sell Jill a piece of property for $2 million. Jack promises to hold his offer open until January 15th. On January 13th, before Jill can accept his offer, Jack revokes his offer. Jill can sue Jack in court and win for specific performance (i. e. make Jack sell the property to her for $2 million).

Yes Jill can sue Jack if certain conditions are in place

Explanation:

From indication, Jack and Jill had an oral form of agreement, and understanding. This implies that each party ought to keep to their part of the agreement. If Jack then defiles the rule of the agreement, Jill can take it up in court if evidence of the oral discussions can be established, especially in terms of the amount that was agreed upon and the date it was reached.

my dads name is jeff?