Which one of the following methods should be used to repeat a complex part in a drawing in order to minimize file size?

Create a block , or also a reference drawing and attach it.

All Answers are correct the Create a block and Insert

As an AutoCAD designer I would prefer creating a block and insert drawing.

(D) Create BLOCK then use INSERT

I would use D) inserting a Block

I believe the answer is option (d) create a BLOCK then use INSERT

use the blocks and if necessary dynamic blocks