Question

the teacher insisted------- showing my good result. a) upon b)with c)in d) none

Answer 1

hello here is your answer

The teacher insisted upon showing my good result.

option a) upon


hope it helps ^_^

Answer 2

The teacher insisted $\boxed{\textbold{\textinderline{upon}}}$ showing my good result.

Hence, the correct answer is
{ Option A) Upon }.

Upon is chosen because it is a way of speaking 'on' while (being formal).

Also, the sentence makes full sense when 'upon' is used as " The teacher forced him(gentle way) to show his good result.