Question

2. He insisted … using a balanced argument to present the product. a) on b) in c) under d) to

Answer 1

He insisted … using a balanced argument to present the product. a) on

Answer 2

a) on

The correct sentence is: "He insisted on using a balanced argument to present the product."

"Insist on" is a phrasal verb that means to demand or require something. Therefore, "on" is the correct preposition to use after "insisted" in this context.