正确答案：AB
解析：
The 'despite' shows that we need an answer that is the opposite of "ungoverned by...forethought." Basically, the mayor comes across as spontaneous but he is actually the opposite of this.

(A) and (B) are using second definitions of the words. In both cases the words mean 'planned, deliberate.'

Synonym pairs (C) and (D) are not the opposite of spontaneous.

The other synonym pairs, (E) and (F), are not the opposite of spontaneous either. One can be spontaneously critical.