An offeree may legally reject a contract offer by any means, EXCEPT:

The action of asking for clarification or additional information does not constitute a legal rejection of a contract offer. When an offeree seeks further understanding about the terms or details of the offer, this is generally seen as an effort to gather necessary information to make a more informed decision rather than a refusal to accept the offer.

In contrast, accepting the offer on one condition, proposing a new offer, or explicitly rejecting the offer constitutes a rejection of the original offer. When an offeree accepts the offer with modifications or asks for new terms, they are effectively altering the original contract, which is a counteroffer. Similarly, explicitly stating a rejection is a clear denial of the offer. Therefore, seeking clarification remains an open dialogue about the possibility of acceptance, not a rejection.