We are given the following terms.
A. -5acb
B. 5acz
C. 6bca
D. -4bza
E. -2cab
Which of the them are like terms?
Recall that like terms means that they have the same variables.
Notice that terms A, C and E have the same variables "abc" (the order doesn't matter)
So the terms A, C and E may be written as
A. -5abc
C. 6abc
E. -2abc
Therefore, the terms A, C, E are like terms.