Roller Coasters and Co. has offered to sell thirty cars and tracking to Hang In There Oceanside Park for$300,000and has promised to keep its offer open until the last of the month. What is Roller Coasters and Co. legal position in this situation? 1) The promise to hold the offer open is contrary to public policy and is unenforceable. 2) The offer can be revoked before the last day of the month with the consent of Hang In There Oceanside Park 3) Roller Coasters and Co. is legally bound to keep its offer open until the last day of the month. 4) The offer can be revoked at any time by Roller Coasters and Co. without legal consequence 5) Roller Coasters and Co. can revoke their offer any time before acceptance by notifying Hang In There Oceanside Park of its revocation.