According to the Table, Ion-Exchange Chromatography Would Be the LEAST

According to the table, ion-exchange chromatography would be the LEAST effective method to separate which protein mixture? Protein
MW
PI
A
12,500
3) 2
B
13,200
5) 7
C
13,500
10) 5
D
25,200
6) 3
E
36,900
5) 8
F
78,400
6) 1

A) proteins A, B, and C
B) proteins A, C, and E
C) proteins B, E, and F
D) proteins B, C, and E
E) All of the answers are correct.