The correct answer is B) ensure proper steam flow, thus preventing 'short circuiting' of superheater loops. The division plates installed in boiler superheater headers are designed to guide the steam flow through the superheater tubes in a uniform manner. This prevents 'short circuiting' where some of the steam would bypass the superheater loops, leading to uneven heating and potentially unsafe temperature variations at the superheater outlet. The other options are incorrect because: A) limiting the temperature rise is not the primary purpose of the division plates, C) controlling steam passage is a secondary function, and D) the division plates do not serve all of the purposes listed.