(2)B restricted the purchase yesterday, and the restriction date of B is different from that of E. B restricted the purchase yesterday, which means yesterday was not Thursday, and today is not Friday.
(3) The E train can go on the road tomorrow, and E is restricted on Thursday, so it can go on the road tomorrow, which means that tomorrow is not Thursday and today is not Wednesday.
Summary at this stage: five cars are restricted on different days, e is restricted on Thursday, today is not Wednesday and Friday, and b is restricted yesterday.
Cars A and C can be on the road for four days in a row. Now let's make some assumptions:
Today is Monday: b yesterday was restricted, yesterday was Sunday, Sunday was not restricted, and today is not Monday.
Today is Tuesday: B was restricted yesterday, and yesterday was Monday, which means that the day when A was restricted is one of February, March and May. A needs 2345 to drive on the road, which obviously can't meet the conditions. Today is not Tuesday.
Today is Thursday: B was restricted yesterday, and yesterday was Wednesday, which means that the restricted day of A car is one of 1, 2, 5. Monday can be used, 4567 can be used, Tuesday can be used, 4567 can be used, and Friday can't be used. That is to say, the restricted day of a car can be one of 1 2. Similarly, the restricted day of C car is 65433.
Today is Saturday: B was restricted yesterday, and yesterday was Friday, which means that A's restricted day is one of 1, 2, 3, and A needs 67 12 to get on the road, which means A's restricted day is 3. Similarly, the limit day of C can only be 3, and the limit days of two cars are different, so today is not Saturday.
Today is Sunday: B It was restricted yesterday, yesterday was Saturday, Saturday was not restricted, and today is not Saturday.
So, today can only be Thursday, and the answer is B.