The position of a topic sentence often shifts, according to the author and writing style. where is one place the sentence should never be

The position of a topic sentence can be placed at the beginning of the paragraph, which forms a deductive order (Main topic then down to the supporting details). It can also be placed at the end of the paragraph, which forms an inductive order (supporting details before the main topic). But a topic sentence should never be placed in the MIDDLE of the paragraph.

Dbecause it makes sense

All of the above
a
b
c
d