Tom has twelve slips of paper which he wants to put into five cups labeled $A, B, C, D, E$. He wants the sum of the numbers on the slips in each cup to be an integer. Furthermore, he wants the five integers to be consecutive and increasing from $A$ to $E$. The numbers on the papers are $2, 2, 2, 2.5, 2.5, 3, 3, 3, 3.5, 4$ and $4.5$. If a slip with $2$ goes into cup $E$ and a slip with $3$ goes into cup $B$, then the slip with $3.5$ must go into what cup?
Tom想把12张纸条放进5个标有$A, B, C, D, E$的杯子里。他希望每个杯子中的纸条上的数字之和均为整数。并且，他希望这5个整数是连续的整数，从$A$到$E$递增。这12张纸条上的数字分别是$2, 2, 2, 2.5, 2.5, 3, 3, 3, 3.5, 4, 4.5$。如果写有2的那张纸条放进了杯子$E$，写有3的那张纸条放进了杯子$B$，那么写有3.5的那张纸条一定放进了哪个杯子?

A. A

B. B

C. C

D. D

E. E