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						 Read the facts and the question and then choose the best answer. 
						A writes to B on Monday saying: "If you accept this offer within three days, I'll sell you 100 slabs of beer at 20% less that my normal price." 
						B posts his reply to A on Wednesday, saying: "I accept your offer of 100 slabs of beer at a 20% discount." 
						However, A only receives B's letter on Friday. Has B validly accepted A's offer? 
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