Blue Book Writing, pg 480 #25, 28

mabsjenbu123
Sat, 20 Dec 2008 22:09:02 +0000

This is kinda like an idiom type question. You have a preoccupation IN technique and not ON technique. Just something you have to memorize
“its” is incorrect because “its” is for a singular subject. However, the subject, “tabletS”, is plural. The correct answer should be “their”