Which of the following is NOT a situation where an offer may be terminated before acceptance?
A. Where the offer is rejected by the offeree outright or by way of a counteroffer
B. When the offer does not bear the signature of the offeror
C. When the conditions attached to the offer remain unfulfilled
D. When the offer is revoked by the offeror, or the offeree makes acceptance impossible
E. When sufficient time has elapsed since the date of the offer to justify the inference that the offeree did not wish to accept it.