Help in Verbal: TC Question

An element of _____ on the part of the audience is interwoven into the multi-era saga, for two actors portraying the same character at different phases of life are distinguishable enough that the audience is able to discern differences for which the mere passing of years cannot account.

A - Surprise;
B - foreboding;
C - Disbelief;
D -Confusion;
E - predictability

the clue for solving the blank is distinguishable and able to discern differences. —> that
Now, if the audience are able to that then they are not surprised or foreboding(uneasy) or confused and neither they are predicating anything ,so, the only choice we are left with is C

Very well explained. Thanks.